$\left(-ab^2\:+\:8a^2b\right)-\left(\frac{2}{5}ab\:-\:\frac{4}{3}a^2b\right)$
$11x^2-11x+7$
$\left(x+3\right)^2y''+\left(b+1\right)x\cdot y'+3\left(b+1\right)\cdot y'$
$20x^2-33x+7=0$
$5.04-1.03$
$9x^2-35=6x$
$\frac{v^2+6v-16}{2v-8}+\frac{6v-30}{v-3}=\frac{v+8}{2}$
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