$\frac{64a^9+729}{4a^3+9}$
$01\cdot7$
$4+y=9.5$
$\left(a+1\right)-7\left(a+1\right)$
$\frac{x^2-7x+5}{x-5}$
$x2+2x-15$
$x+2y+5x^2y-9x+7x-3y-12x^2y$
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