$\frac{d^2}{dx^2}sin2x$
$\int_0^{400}\left(0.002x^3\right)dx$
$77\left(\frac{1}{11}z^8-\frac{1}{7}\right)^3$
$77x^2-108x-1620$
$-x^3+x^2+48$
$\frac{3}{16}x-48x^9$
$\frac{2x+2}{x+2}-\frac{x-2}{x+4}$
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