$9c+c$
$\frac{18x^4y^2}{27y^{-3}}$
$\left(9x-4\right)\left(9x-11\right)$
$\int_{-\infty}^0\left(0\right)dx$
$x^2-1=1-x^2$
$0=3sin^2x-14sinx-5$
$x^2=\frac{x+3}{2}$
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