$3xy^2+5xy^2$
$\left(x^2+4\right)^4-\left(x^2+6x\right)^3$
$\int cos\:\left(x+2\right)dx$
$\left(\frac{2}{3}a^2+b^4+5\right)\left(5-\frac{2}{3}a^2+b^4\right)$
$\frac{1}{x}-\frac{1}{x\left(x+1\right)}$
$v^2+13v+10$
$cosb\:+4\:=3cosb+4$
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