$4x^2-29x^2+25$
$m^2+m+1$
$-\left(2ax-3b\right)^2$
$\frac{5x^2}{6x^2+3}$
$\frac{3x+2}{x-1}\le\:2$
$\frac{\left(4x+9\right)}{\left(5x^2-39x-8\right)}$
$2=b-8$
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