$\left(-512\right)+69+171$
$\frac{3}{\:x+8}+\frac{x}{x-4}=\frac{7x+9}{x^2+4x-32}$
$tan\left(cos^{-1}\frac{1}{3}\right)$
$-6y-10$
$6x^2-9xy-27y^2$
$\frac{x^2+2x}{3x^2-1}$
$\int\left(x-x^7\right)^4dx$
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