$k^2-15k+50$
$x\:^3-\:3x^2\:-\:x\:+\:3$
$\left(-4X+2Y+3\right)X\left(2X+3\right)$
$3x^4c-72y^4c$
$\int a^tdt$
$8a+84=180$
$\frac{\csc\left(x\right)}{\cot\left(x\right)}-\sec\left(x\right)$
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