$\int x^{-4}\:\ln\left(2x\right)\:dx$
$90\cdot50$
$9^2+9$
$\int\:2x\sqrt{2x-3}dx$
$\int\frac{\left(x\right)}{\left(-8x^2+9\right)}dx$
$\left(3x^2y+z\right)^2$
$-x-2^2$
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