$\left(999\right)^7$
$\sin\left(x+20\right)=\frac{1}{2}$
$7t^2+28t+56=0$
$\int\frac{x-2}{x^2-4}dx$
$\left(x^4+2x^3-11x^2-12x+36\right)\left(x+2\right)$
$17-\left(-22\right)-22$
$\int2x\cdot e^{6x}dx$
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