$\frac{z^6}{z+2}$
$64x^{10}+32x^7+4x^4$
$\int\:\frac{2^t}{2^t+3}dt$
$cos2x\left(2cosx+1\right)=0$
$-3\left(-2^2\right)$
$4x+3y^2-7z^4+5z^4+11-4x+y^2$
$\frac{dy}{dx}=\frac{5x}{8y\sqrt{x^2+1}}$
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