$\lim_{x\to-7}\left(\frac{x-7}{\left|x+7\right|}\right)$
$\left(y^2-2y+2\right)^3$
$\sqrt[4]{25a^8}b^5$
$2-b=\log\left(7c+9\right)$
$\int e^{-2\:^{\circ}}cos^{\circ}d^{\circ}$
$\frac{\left(x^8+x^6+x^5+x^4\right)}{x^3+1}$
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