$\lim_{x\to0}\left(\frac{2}{tan\left(x\right)}-\frac{4}{x^2}\right)$
$5+3y^2=2x^3$
$-3x^2+5x-2=0$
$\left(2x+3x\right)\left(4y-3x\right)$
$13d\:+\:2e\:+\:5g\:+\:12d\:+\:4e\:+\:7$
$p^4-6p^2-1$
$\sqrt{27}\cdot\sqrt{\frac{96}{81}}$
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