$\frac{1}{5}w-3$
$\frac{d}{dx}\:\frac{4}{\sqrt{t-1}}$
$\left(a^2+ab+b^2\right)\left(a-b\right)$
$454+230$
$x^2-14x+49=25$
$\lim_{x\to0}\frac{6x^3-4x}{2x^4+x}$
$14xy+12y$
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