$r^2+8r+15$
$\frac{49a^2b^8-c^4}{7ab^4-c^2}$
$\log\left(v^2\right)=\log\left(4\right)$
$a^{\frac{-2}{5}}$
$\frac{2x^2+14x+24}{2x+8}$
$\left(a^x-a^{x+1}+a^{x+2}\right)\left(a^2+1\right)$
$x-7>2x-5$
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