Inclusion Criteria:

- Patients should have a life expectancy of at least 10 years, excluding their
diagnosis of breast cancer.

- Submission of a block from the diagnostic biopsy sample and from the surgical sample,
if gross residual disease greater than or equal to 1.0 cm was removed at the time of
surgery, is required for all patients

- Patients of reproductive potential must agree to use an effective non-hormonal method
of contraception during therapy and for at least 6 months after the last dose of
study therapy.

- The Eastern Cooperative Oncology Group (ECOG) performance status must be 0 or 1.

- Patients must have the ability to swallow oral medication.

- The diagnosis of invasive adenocarcinoma of the breast must have been made by core
needle biopsy or by limited incisional biopsy.

- Patients must have ER analysis performed on the primary tumor prior to randomization.
If ER analysis is negative, then progesterone receptor (PgR) analysis must also be
performed. (Patients are eligible with either hormone receptor-positive or hormone
receptor-negative tumors.)

- Breast cancer must be determined to be HER2-positive prior to randomization. Assays
using FISH or CISH require gene amplification. Assays using IHC require a strongly
positive (3+) staining score.

- Clinical staging, based on the assessment by physical exam, must be American Joint
Committee on Cancer (AJCC) stage IIB, IIIA, IIIB, or IIIC: cT2 and cN1; cT3 and cN0
or cN1; Any cT and cN2 or cN3; or cT4

- The patient must have a mass in the breast or axilla measuring greater than or equal
to 2.0 cm by physical exam, unless the patient has inflammatory breast cancer, in
which case measurable disease by physical exam is not required.

- At the time of randomization, blood counts performed within 4 weeks prior to
randomization must meet the following criteria: absolute neutrophil count (ANC) must
be greater than or equal to 1200/mm3; Platelet count must be greater than or equal
to 100,000/mm3; Hemoglobin must be greater than or equal to 10 g/dL

- The following criteria for evidence of adequate hepatic function performed within 4
weeks prior to randomization must be met: total bilirubin must be less than or equal
to upper limit of normal (ULN) for the lab unless the patient has a bilirubin
elevation greater than ULN to 1.5 x ULN due to Gilbert's disease or similar syndrome
involving slow conjugation of bilirubin; and alkaline phosphatase must be less than
or equal to 2.5 x ULN for the lab; and aspartate aminotransferase (AST) and ALT must
be less than or equal to 1.5 x ULN for the lab.

- Patients with alkaline phosphatase greater than ULN but less than or equal to 2.5 x
ULN are eligible for inclusion in the study if liver imaging (CT, MRI, PET, or PET-CT
scan) performed within 4 weeks prior to randomization does not demonstrate metastatic
disease and the requirements for adequate hepatic function are met.

- Patients with either unexplained skeletal pain or alkaline phosphatase that is
greater than ULN but less than or equal to 2.5 x ULN are eligible for inclusion in
the study if a bone scan, PET-CT scan, or PET scan performed within 4 weeks prior to
randomization does not demonstrate metastatic disease. Patients with suspicious
findings on bone scan or PET scan are eligible if suspicious findings are determined
to be benign by x-ray, MRI, or biopsy.

- Serum creatinine performed within 4 weeks prior to randomization must be less than or
equal to 1.5 x ULN for the lab.

- The left ventricular ejection fraction (LVEF) assessment by 2-D echocardiogram or
multiple gated acquisition(MUGA) scan performed within 90 days prior to randomization
must be greater than or equal to 50% regardless of the facility's LLN.

Exclusion Criteria:

- fine-needle aspiration (FNA) alone to diagnose the primary breast cancer.

- Excisional biopsy or lumpectomy performed prior to randomization.

- Surgical axillary staging procedure prior to randomization. (Procedures that are
permitted prior to study entry include: 1) FNA or core biopsy of an axillary node for
any patient, and 2) although not recommended, a pre-neoadjuvant therapy SN biopsy for
patients with clinically negative axillary nodes.)

- Definitive clinical or radiologic evidence of metastatic disease. (Note: Chest
imaging [mandatory for all patients] and other imaging [if required] must have been
performed within 90 days prior to randomization.)

- History of ipsilateral invasive breast cancer regardless of treatment or ipsilateral
ductal carcinoma in situ (DCIS) treated with radiation therapy (RT). (Patients with
a history of LCIS are eligible.)

- Contralateral invasive breast cancer at any time. (Patients with contralateral DCIS
or lobular carcinoma in situ (LCIS) are eligible.)

- History of non-breast malignancies (except for in situ cancers treated only by local
excision and basal cell and squamous cell carcinomas of the skin) within 5 years
prior to randomization.

- Known metastatic disease from any malignancy (solid tumor or hematologic).

- Previous therapy with anthracyclines, taxanes, cyclophosphamide, trastuzumab, or
neratinib for any malignancy.

- Treatment including RT, chemotherapy, and/or targeted therapy, administered for the
currently diagnosed breast cancer prior to randomization.

- Continued endocrine therapy such as raloxifene or tamoxifen (or other SERM) or an
aromatase inhibitor. (Patients are eligible if these medications are discontinued
prior to randomization.)

- Any continued sex hormonal therapy, e.g., birth control pills and ovarian hormone
replacement therapy. Patients are eligible if these medications are discontinued
prior to randomization.

- Active hepatitis B or hepatitis C with abnormal liver function tests.

- Intrinsic lung disease resulting in dyspnea.

- Active infection or chronic infection requiring chronic suppressive antibiotics.

- Malabsorption syndrome, ulcerative colitis, inflammatory bowel disease, resection of
the stomach or small bowel, or other disease or condition significantly affecting
gastrointestinal function.

- Persistent greater than or equal to grade 2 diarrhea regardless of etiology.

- Sensory or motor neuropathy greater than or equal to grade 2, as defined by the NCI
Common Toxicity Criteria for Adverse Effects (CTCAE) v3.0.

- Conditions that would prohibit intermittent administration of corticosteroids for
paclitaxel premedication.

- Chronic daily treatment with corticosteroids with a dose of greater than or equal to
10 mg/day methylprednisolone equivalent (excluding inhaled steroids).

- Uncontrolled hypertension defined as a systolic BP greater than 150 mmHg or diastolic
BP greater than 90 mmHg, with or without anti-hypertensive medications. (Patients
with hypertension that is well-controlled on medication are eligible.)

- Cardiac disease (history of and/or active disease) that would preclude the use of any
of the drugs included in the treatment regimen. This includes but is not confined
to: Active cardiac disease: symptomatic angina pectoris within the past 180 days
that required the initiation of or increase in anti-anginal medication or other
intervention; ventricular arrhythmias except for benign premature ventricular
contractions; supraventricular and nodal arrhythmias requiring a pacemaker or not
controlled with medication; conduction abnormality requiring a pacemaker; valvular
disease with documented compromise in cardiac function; and symptomatic pericarditis.
History of cardiac disease: myocardial infarction documented by elevated cardiac
enzymes or persistent regional wall abnormalities on assessment of LV function;
history of documented congestive heart failure (CHF); and documented cardiomyopathy.

- Other nonmalignant systemic disease that would preclude the patient from receiving
study treatment or would prevent required follow-up.

- Pregnancy or lactation at the time of randomization.

- The investigator should assess the patient to determine if she has any psychiatric or
addictive disorder or other condition that, in the opinion of the investigator, would
preclude her from meeting the study requirements.

- Use of any investigational agent within 4 weeks prior to randomization.