$4-3+54-20+8-9$
$3x-2>x+5$
$2r^2\:-\:2s^2\:+\:hr^2\:-\:hs^2\:$
$4g^3w-20g^2w^2+25gw^3$
$\left(3x^2y^2-5x^2y\right)\left(x-xy\right)$
$\lim_{x\to\infty}\left(\frac{\left(2-\left(4x^2+4x\right)\right)}{3x-2x^2+1}\right)$
$\frac{da}{dt}=-10a+80t$
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