$1+\cos\left(2x\right)=2\cos^2\left(x\right)$
$\sqrt{x^9}\sec\left(x\right)$
$5b^2\sqrt{a^2}b^2c^2$
$y^3-49y=0$
$4x^2+48y+12x=159$
$\frac{dy}{dx}=\left(2x+y-1\right)^2$
$\left(10m+n\right)^2-\left(10m-n\right)^2$
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