$x=\frac{\left(1-r\right)y}{2}$
$\left(20y\right)\left(+7\right)$
$\frac{8x^3y^3}{6xy^2}$
$\left(a^2+by\right)^2$
$1.5\int e^udu$
$4x+1>11$
$3ydx\:+\:2xdy=0$
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