$7x-91=0$
$\left(\frac{-xy^{-5}z}{xy^3}\right)^5$
$\left(-19.2\right)\left(0.\right)$
$3x^2-4y^2=9$
$49y^3+23y^2+22y^2+7y^2$
$\frac{3x+2x-1}{4x}$
$\int e^{\frac{x^4}{4}}x^3dx$
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