$8a^2-16a-90$
$\frac{dy^2}{dx^2}y\left(x\right)=x^2-1$
$\int x\left(x-x^2+x^3-x^4\right)dx$
$-3x^2+2x+1$
$-1+2^2-\left(-37\right)$
$8x^4-4x^3+6x^2$
$2\cos\left(x\right)-2\sin\left(x\right)\cos\left(x\right)$
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