$5ax^3+10ax^2-5ax-10a$
$7\left(b\:+\:2\right)\:+\:7$
$\lim_{x\to\frac{3\pi}{4}}\left(x\right)$
$\frac{1}{\tan^2a+1}+\frac{1}{\cot^2+a+1}$
$\left(y+10\right)\left(y-25\right)$
$\frac{csc\theta}{sec\theta\:}=cot\theta\:\:$
$10cos\left(x-3\right)$
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