simplify 3y+5x-7(x-1)-(y-2x+3)(x+4)
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Step-by-step explanation:
=3y+5x-7x+7-(xy+4y-2x^2-8x+3x+12)
=3y-2x+7-xy-4y+2x^2+8x-3x-12=2x^2+6x-4y-xy-5
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