simplify (a cubed minus 2a squared) minus (3a squared minus 4a cubed)

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1 Answer

a^3 -2a^2 -(3a^2 -4a^3)

=a^3 -2a^2 -3a^2 +4a^3

=(a^3 +4a^3) +(-2a^2 -3a^2)

=5x^3 -5a^2
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