$\left(a^{-2}+b^{-5}\right)^2$
$-4\left(9+6\right)$
$\lim_{x\to\infty}\left(\frac{x-|x|}{2x}\right)$
$\frac{-4x+3}{\left(7x+2\right)\left(3x+5\right)}$
$6y^3\left(3x-4y^2\right)$
$\frac{12x^3-23x^2+13x-3}{3x-2}$
$2+5+4+5$
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