$\int x\ln\frac{1+x}{1-x}dx$
$\frac{x^2-16}{x+3}\cdot\frac{1}{x+4}$
$14a^2b^2+22a^2b$
$-19.75-45.9-0.67$
$\cos\left(t+v\right)$
$9.92\cdot10^7$
$mq-rp=d$
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