$cos\theta\:-cos\theta\:sin^2\theta\:$
$3\left(-7\right)+4$
$cot\:2x\:=\frac{3}{4}$
$36a^8-b^2$
$\lim_{x\to+\infty}\left(\frac{5e^x-3x^7+9}{e^7+x^7}\right)$
$\log\left(\frac{5y}{4}\right)$
$4+\left(-2\right)-\left(-7\right)-6+\left(+1\right)$
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