(2x+y)(1+4x+3y)-6x(x+y)
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(2x + y)(1 + 4x + 3y) - 6x(x + y)
= (2x + y + 8x² + 4xy + 6xy + 3y²) - 6x² - 6xy
= 2x + y + 8x² + 10xy + 3y² - 6x² - 6xy
= 2x² + 3y² + 4xy + 2x + y
RickHazra99:
Nice
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