$x^2-x-3=9$
$x\:^3-2x$
$\lim_{x\to\frac{\pi}{2}}\left(-tanx\right)^{cosx}$
$\frac{x^4}{\left(4x+1\right)^2}$
$\int\frac{11x^2-43x+36}{x\left(x-2\right)\left(x-3\right)}dx$
$2\cos^2x-2\sin^2x=1$
$6x^2\:-\:11x\:-\:60$
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