$\left(\sqrt{x}^2\right)+2\left(\sqrt{x}\right)-3$
$3x^2-25x-50$
$\left(-1\right)^n\left(\frac{n^2}{2n^2}\right)^n$
$\frac{b^2+b-5}{b+3}$
$\left(5x-x^2\right)^2$
$\int\left(x^3-x^2+x-1\right)\sin\left(x\right)dx$
$36^2x-72x+81$
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