$4x^2-5x-2$
$\lim_{x,y\to0,0}\left(\frac{\sin\left(xy\right)}{\sin\left(x\right)\sin\left(y\right)}\right)$
$\frac{d}{dx}\left(\left(x+y\right)^{0.5}=x\right)$
$\left(3x^7+2\right)\cdot\left(5x^2+2x^3-2\right)$
$3^2\:-2ab\:-4^2$
$\lim_{x\to0}\frac{e^{4x}-1}{x}$
$x^5\frac{dy}{dx}+y^5=0$
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