$\frac{2x^2\left(x+7\right)}{6x\left(x+7\right)}$
$2x^2+7x+1=0$
$300\:\:+\:2.400\:-103$
$\int y^2cos\left(\frac{y}{a}\right)dy$
$36\cdot36$
$\frac{1}{5}ab-\frac{4}{5}ab$
$\ln\frac{5x^2+3}{x^2}$
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