$\lim_{x\to-1}\left(\frac{x^3+4x^2+6x+3}{x^3-4x-3}\right)$
$\sqrt[4]{625\cdot81}$
$\frac{d^2}{dx^2}e^{2x}$
$3b\:+\:2a\:5c\:-4\:6\:+\:8a\:7c\:-9$
$-11y^4+20y^4$
$64-a^8$
$4\sin\left(x\right)=2\sin\left(x\right)+\sqrt{2}$
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