-3(2a-ab²)+4(a+ab²-5);1/2x-2(x-y²)-(3/2x+y²)

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-3(2a-ab²)+4(a+ab²-5);1/2x-2(x-y²)-(3/2x+y²)
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-3(2a-ab²)+4(a+ab²-5);1/2x-2(x-y²)-(3/2x+y²)
-3(2a-ab²)+4(a+ab²-5);
1/2x-2(x-y²)-(3/2x+y²)

-3(2a-ab²)+4(a+ab²-5);1/2x-2(x-y²)-(3/2x+y²)
-3(2a-ab²)+4(a+ab²-5);
=7ab²-2a-20
1/2x-2(x-y²)-(3/2x+y²)
=-3x+y²