$\frac{3x+10}{x^2+9x+20}$
$1-6\cdot8$
$\frac{8^3}{8^2}$
$\int_0^{\pi}\:-17\:senxdx$
$8^2-5^2$
$\frac{di}{dt}=i-i^2$
$\int\frac{x^3}{\sqrt[5]{5x^2+1}}dx$
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