$\cos^2+\cos^2+\tan^2$
$\lim_{x\to0}\left(\frac{\tan\left(4x\right)^2}{2x^2}\right)$
$2\tan\left(x\right)+1=3\tan\left(x\right)$
$\int10x\left(5x^2+1\right)^2dx$
$\frac{dw}{dx}+\left(1+\frac{1}{x}\right)w=\frac{1}{x}$
$2+3+5+4+7+3+5+8$
$\left(u-3\right)^2$
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