$\cos^4\left(x\right)-\sin^4\left(x\right)=\cos2\left(x\right)$
$\frac{c^4}{c^7}$
$\left(5m+7a^8\right)\left(-4b^4+3n^5-8\right)$
$56w^2+47w-18$
$\left(9a\:+5b\right)^2$
$x\frac{dy}{dx}-y-2x^2y=0$
$6\left(3a\right)^1\left(4b^2\right)^5$
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