$\lim_{x\to3}\left(\frac{x-3}{\sqrt{x^2-9}}\right)$
$solve\left(x^2+\:8x\:+10\right)$
$4\cos^2x-2\cos x-2=0$
$8\left(-11+2\right)-3\left(+12-6\right)$
$\frac{9x^4-100}{3x^2-10}$
$\frac{3x^4+2\sqrt{2x^3}+4x^2+\sqrt{2}x-10}{3x-\sqrt{2}}$
$\int\cos^2\left(11x\right)\sin\left(11x\right)dx$
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