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(2x + 7y)²
(2x)² + 2*2x*7y + (7y)²
4x² + 28xy + 49y²
(99)³
(100 - 1)³
(x-y)³ = x³ - 3x²y + 3xy² - y³
1000000 - 30000 + 300 - 1
970299
6xy² - 3xy - 10y + 5
3xy(2y - 1) - 5(2y - 1)
(2y - 1)(3xy - 5)
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