$\left(2\sin\left(y\right)\right)\cdot dx+\left(x^2\cos\left(y\right)\right)\cdot dy=0$
$\frac{d}{dx}-\sin\:x-\cos x$
$\frac{3x^3+8x^2-2}{3x+x^2-1}$
$\left(7n-2m^2\right)^2$
$5=4z+13$
$an+1=an+2$
$\frac{x^{-3}y^{-4}}{x^4y^5}$
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