$\frac{1}{1+y^2}dy=tan\left(x\right)dx$
$\lim_{x\to\infty}\left(\frac{\ln\left(100x\right)}{x^{0.01}}\right)$
$x^4+7x^2-30$
$3m+m$
$\int\left(\frac{\:e^{3x}+e^{-x}}{e^x}\right)dx$
$\int4x\left(x^4-7\right)^2dx$
$x\left(x+4\right)=117$
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