$sec^2\left(x\right)+2tan\left(x\right)$
$\lim_{x\to0}\left(\frac{9sin\left(\pi\:x\right)}{ln\left(x^5\right)}\right)$
$4\left(x+2\right)-20\left(x-6\right)$
$\frac{\left(2sinxcosx\right)}{sinxcosx}$
$\lim_{x\to\infty}\:\frac{1-3e^x}{e^x+4}$
$y=\frac{2x^2}{1+x^3}$
$\left(4x^2-10\right)\left(5z^3-2z\right)$
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