$\int-9^{-2x}dx$
$\left(-3\:+\:7\:-\:9\right)\:+\:|+5|\:-\left(|-6\:+\:8|\right)$
$54\:+\:103\:-\:7\:-\:2$
$5x^4y-x^5y^2-3x^2z\cdot x^5y^2-3x^2z$
$2csc\left(2x\right)=tanxcotx$
$\lim_{x\to\infty}\left(\frac{x^2+1}{x^3-x}\right)$
$2-4z+8z$
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