$3t^2-5t+6$
$-z+5z-12z+3z\:$
$\int\frac{2x-8}{\left(x+2\right)\left(x+5\right)}dx$
$\frac{2x^2+5x-7}{x-3}$
$t^2+5t+6$
$\sin\left(4x\right)\cdot\sec\left(2x\right)\cdot\csc\left(2x\right)$
$-306+-34$
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