$\lim_{x\to0}\left(\frac{2x+8}{x-4}\right)$
$\sec\left(x\right)+3=1$
$\int\left(cos^235x\right)dx$
$x-63=17$
$4x+10x$
$\frac{dx}{dy}=\frac{2x}{y}+y^3$
$\left(x+11\right)\left(x-4\right)$
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