$8-9+8\cdot5$
$\left(-2x^3\:y^4\right)^3$
$\frac{\left(3x^4y^{-5}\right)^0}{\left(2x^6y^3\right)^{-2}}$
$\int\left(x^3\right)e^{-4x}dx$
$\int csc^9xdx$
$\frac{2x^2}{x^2+y^2}+\frac{2y^2}{x^2+y^2}$
$\left(7a\:-\:b^2\right)\:\left(7a\:+\:b^2\right)$
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