$\lim_{x\to-1}\left(x^4+2x^3+x^2\right)$
$2x^2-3x-4=0$
$\frac{x^3-2x^2-11x+12}{x-3}$
$7x-13x+x-9x$
$\left(3+3y\right)^2$
$\int\left(x^6\left(x^7+17\right)^9\right)dx$
$r^{2\:}-\:2r\:-\:3$
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