$2x\sqrt{20x^{20}}$
$10\sin4x\cos4x$
$\lim_{x\to\infty}\frac{3x-1}{3x+5}^{2x-11}$
$165^2$
$125c^3\:-\:1\:$
$x^2-8x-56=0$
$\frac{d^5}{dx^5}\left(9x^5+6x^3\right)$
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