$\frac{3}{2}-\frac{9}{3-3}$
$-2\cdot3+-2\cdot6$
$\int\frac{1}{x^2-4x-5}dx$
$\left(m+n+z\right)^2$
$\cot\left(a\right)-\tan\left(a\right)=\csc\left(a\right)-2\sin\left(a\right)$
$3x^5-27x^4+27x^3-27x^2+24x$
$\log\left(x^2+x\right)$
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