$\frac{9\left(x-1\right)}{4}$
$\frac{d}{dx}\frac{t^2-1}{t^2+t-2}$
$-20-18-18+24+23+22+2+20-5-15$
$-\left(4-1^2\right)+\left(-\frac{4^2}{2}\right)$
$x+22>24$
$\left(6h^{2}-\frac{1}{4}k\right)^{3}$
$bm^2+bn^2+am^2+an2$
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