$\int\frac{x^2-x-3}{\left(x+4\right)\left(x-2\right)}dx$
$\lim_{x\to0}\left(\frac{\sin\left(19x\right)}{x}\right)$
$\left(x-a\right)^2-\left(x+a\right)^2$
$-7-0.5-4$
$x\:-\:8\:\ge\:10$
$8\left(3n\right)$
$3x^2\left(3x+1\right)-6x\left(3x+1\right)^2$
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