$\int x\cdot\cos^2\left(5x\right)dx$
$7c^2d^4+14d^5e^3-21e^2f^3+28f^4g^2$
$\sqrt{1008a^4b^6c^5}$
$\frac{dy}{dx}=\frac{y^2}{xy^2+xy}$
$-33x+16x+27x$
$x^2+4=7x$
$2sin^2\:\frac{x}{2}-1$
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