$\left(+4\right)-\left(-40\right)$
$x^2+162x+27$
$\ln\left(x^2\sqrt{9-x^2}\right)$
$\left(x^2+2x\right)^2-2\left(x^2+2x\right)-3$
$y^2+3+\frac{9}{4}$
$\left(-2z-9\right)\left(7z+6\right)$
$\int xa^rdx$
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