$\frac{d}{dx}x\cos y=x^2+2y$
$\lim_{x\to0}\left(\frac{\ln\left(2\right)}{7}\right)$
$\left(x^2-1\right)^2<4x^2$
$\left(2xy\right)\left(-3wz\right)\left(5mn\right)$
$4x+5x+8y$
$4y^2\:dx\:+y^2e^{-x}\:dy\:=0$
$\frac{-3x^4+4x^3-6x^2-5}{x^2-2x+4}$
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