$8\left(-10v+-5\right)$
$81a^6+36-108$
$\frac{3}{a}+\frac{2}{5a-3}+1-\frac{85a}{25a^2-a}$
$\left(ax+b\right)^2=a^2x^2+2abx+b^2$
$7x-49=0$
$9x^4-85x^2+36$
$4x+2=5x-1$
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