$\left(1+cos\theta\:\right)\left(1-cos\theta\:\right)=sin\theta\:\:cos\theta\:\:tan\theta\:$
$3n^2-3n-36$
$\int\frac{5}{\sqrt{x^2+16}}dx$
$81x^2-36xy+4y^2$
$\frac{d}{dx}\left(6e^{yz}cos\left(xyz\right)\right)$
$y'+\frac{3}{100}x=3$
$\left(3y+16\right)^2$
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