$\left|3+\left(-13\right)\right|+\left|-17\right|$
$\frac{5^7}{5^3}$
$\left(3m+9n\right)\left(3m-9n\right)$
$2x+y;\:x=7;\:y=10f$
$\frac{5}{6}x-2=-\frac{2}{3}x+1$
$-\left(1-x\right)>2x-2$
$\frac{5x^2+20x+16}{x+3}$
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