$\left(\frac{2}{5}\:+\:a\:\right)\left(\frac{2}{5}-a\right)$
$\lim_{x\to\infty}\:10$
$\frac{s^2-s-3}{s\left(s-1\right)\left(s+3\right)}$
$\lim_{x\to1}\frac{1-\cos\left(4x\right)}{x\sin\left(5x\right)}$
$\int\left(\frac{z^{-4}}{3}\right)dz$
$\left(-3y\right)\left(5x\right)$
$\frac{3x^2-2x+2}{x+2}$
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