$\lim_{x\to4}\left(\frac{x^2+2x-15}{x-3}\right)$
$2x^2-3x-04$
$\frac{3.50}{2.50}$
$\int\left(-\frac{10}{t+7}\right)\:dt$
$4-9n^2$
$\frac{1}{2}x^4+2x^3-\frac{2}{3}+\left(x-3\right).\left(\frac{1}{4}x^4+\frac{2}{3}x-x^5\right)$
$9x^{3}+24x^{2}+13x+2+3x+1$
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