$\cot^2x-\csc^2x=-1$
$\int\:\frac{9x^3}{\sqrt{\left(x^4+z\right)^5}}dx$
$\int-5x^4dx$
$\frac{2n^2}{\left(n^2\right)^{-2}}$
$8.02-2.42$
$-12=-2n+10$
$4x^2-12x+96$
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