$4h\:=\:32\:$
$4-3sin^2x$
$cot\left(x\right)=\frac{1+cot^2\left(x\right)}{csc\left(x\right)sec\left(x\right)}$
$12x+8$
$-m+3m$
$\lim_{x\to-4}\left(\frac{x^2+3x+4}{x^2-16}\right)$
$2x-x^2-3x^2-6x$
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