$\frac{-10x^2}{2x}$
$\:2\left(7t+1\right)+2t$
$\int\left(x^3-2x-1\right)dx$
$9x-9-8x-32$
$5\left(-8+5\right)-4$
$\int\frac{\sin\left(x\right)}{2\cos\left(x\right)+3}dx$
$a^2+a^4-a^6$
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