$3a-6b+3-7a+10$
$\frac{x^9+y^9}{x^3+\:y^3}$
$\lim_{x\to0}\left(\frac{x^2+3x+2}{sin\left(x+1\right)}\right)$
$\left(a+6\right)\left(a+6\right)=0$
$\frac{1}{4}\left(x-\frac{2}{5}\right)\ge2.\left(\frac{1}{4}x+\frac{1}{5}\right)$
$\left(10x\:+\:2\right)\:\left(10x\:+\:4\right)$
$8a^2-16a-90$
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