$j^2+28j=-43$
$\int cot^8\left(\frac{x}{3}\right)csc^2\left(\frac{x}{3}\right)dx$
$x^4-\:\left(x^2-\:1\right)^2$
$4+4\cos\left(x\right)=2$
$2e^{2t}\left(e^{2t}-16\right)$
$\int\cos\left(3\right)dx$
$x^2-y^2-3x-3y$
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