$\infty-4$
$\left(3x^2-5x-8\right)$
$-x+5\le11+2x$
$\left(x^2+y^2\:\right)y'=2xy$
$\frac{cot\left(x\right)+tan\left(x\right)}{sec\left(x\right)+cot\left(x\right)csc\left(x\right)}$
$x^6+3x^5$
$\sec^2x=3\tan x-1$
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