$-9\left(1-10x\right)-2\left(3x+9\right)$
$-5cos^2x-2sinx-2$
$\left(c^2-c+5\right)\left(2c^2+6c+3\right)$
$\lim_{x\to1}\left(\frac{x^{15}-1}{x^7-1}\right)$
$9\sin^2\left(x\right)$
$\int\:\:e^{2t}dx$
$\left(2y-z\right)\left(4w-3x\right)$
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