$2sinx=cos2x$
$\lim_{x\to0}\left(\frac{\left(1+x^4-cos\left(x^2\right)\right)}{x^4}\right)$
$\pi\int_{-3}^3\frac{81}{x^2+9}dx$
$8b^3\:+512$
$\left(2^3\cdot2\right)^5$
$\left(x+1\right)\left(x-1\right)^2$
$\frac{1}{1+\frac{2kp}{s+5}\cdot1}\cdot\frac{1}{s}$
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