$x^2y^2-2x^2yz^2+x^2z^2$
$7r\ge-98$
$c^{10}-7c+6$
$\int_1^{\infty}\sin\left(6x-2\right)\cos\left(6x-2\right)dx$
$\left(\frac{1}{x^2y^3}\right)^4.\left(-xy\right)^6$
$\left(f-5\right)\left(f+4\right)$
$\left(-20\right)^{16}\cdot\left(-20\right)^{-16}$
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