$8x^2-7x^2-2$
$\int_{-2}^2\left(x+2\right)kdx$
$\csc^2v=\frac{1+\tan^2v}{\tan^2v}$
$\lim_{x\to0}\left(\frac{2x+e^x-e^{-x}}{\cos\left(x\right)-1}\right)$
$3y^2-27$
$x^2+12x+72$
$-8\cdot\left(-20\right)\cdot6$
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