$\left(v-3\right)\left(v^2+8v\right)$
$\lim_{x\to0}\frac{e^xsen2^x-1}{\ln\left(1+2x\right)}$
$\left(11x-5y\right)^2-\left(13x+3y\right)^2y+\left(x\:-2y\right)^2$
$5r-7a+4r-8r$
$\left[\frac{5}{1}\right]$
$2\left(x+3\right)+4=3\left(x+4\right)$
$\frac{x^4}{x^2+289}$
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