$in\left(x^2-4\right)$
$4x^2+5bx$
$\int\left(2x\left(x^2+12\right)^9\right)dx$
$x^{2\:}+3x\:+1$
$-y^4\:+\:20y^3\:-132y^2\:+369y\:-378$
$11-7-9+3+7$
$2x+3=-17$
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