$-3x\left(x+9\right)>0$
$x^2\:\cdot x^{-7}$
$\int\frac{e^x-1}{x}dx$
$11\sin\left(x\right)+11=0$
$81\:-\:108\:m\:+\:36m^2$
$\frac{x^7y^3}{xy^{-4}}$
$\frac{\sec\left(c\right)-\cos\left(c\right)}{\sin\left(c\right)}$
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