\(-5x^2y+12xy^2+7xy-10xy+3x^2y-4xy^2\)
= \(-2x^2y+12xy^2-3xy\)
= −5x2y+12xy2+7xy−10xy+3x2y−4xy2−5x2y+12xy2+7xy−10xy+3x2y−4xy2
= −2x2y+12xy2−3xy
-5x\(^2\)y+12xy\(^2\)+7xy+3x\(^2\)y-4xy\(^2\)
= (-5x\(^2\)y+3x\(^2\)y)+(12xy\(^2\)-4xy\(^2\))+7xy
= -2x\(^2\)y+6xy\(^2\)+7xy
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