$\int\frac{x^2+2x}{\left(x^2-1\right)}dx$
$y^2+14y-24$
$\left(-1\right)^n\left(\frac{n^2}{2n^3+1}\right)$
$\int_0^b\left(x\sqrt{x-b}\right)dx$
$-20x-23<-15x+2$
$-14\cdot50$
$\left(-20\right)\cdot\left(-5\right)+16$
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