$\frac{2x^2+x}{2x^2-1}$
$\frac{26}{615}\left(0.04227405247813411\right)$
$\left(a^{x+1}+a^{x-2}\right)^2$
$\int\sqrt[3]{\left(2x+3\right)}^7dx$
$5x^2+15x^3+25x$
$\sqrt{27x^3y^5}$
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