$3cot^2x-1=0$
$\lim_{x\to\infty}\left(\frac{\left(x-1\right)}{sin\left(\pi x\right)}\right)$
$-25\:-\left(-40\right)$
$\int\frac{e^{3z}+3}{e^z-3}dz$
$\left(-x+-1\right)\left(-x+4\right)\left(1-x\right)$
$6n^2-20n^2$
$\left(3x^m+4y^n\right)\left(3x^{m-7y^n}\right)$
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