$x - 9 = 1$
$707\pi436$
$\left(2ab^4+5m^5\right)^2$
$\frac{3}{x+1}-\frac{2}{x+2}=1$
$x^2+49x+75$
$\frac{20x^2-180+400}{5x-25}$
$sqrt0.0121$
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