$\frac{\csc\left(t-1\right)}{\cot\left(t\right)}$
$2x\::\:6x^2$
$2x^3-4x^3$
$72j^6-72j^3+18$
$\int\frac{3x+8}{x^3+4x}dx$
$y^2-2y-15=0$
$\left(x^4-2\right)\left(x^4-5\right)$
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