$x^2+9x<-20$
$\int-2xsin\left(3x\right)dx$
$4xb-6x^2a+6yb-9xya$
$\int\left(x+3\right)\cdot e^{-x}$
$x\left(x+2\right)\ge\left(1+x\right)\left(x-3\right)$
$\int x^nin\left(x\right)dx$
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