$\int cos2\left(5x\right)sen\left(5x\right)dx$
$345.000+-810.000$
$2xdx+ydy=0$
$\int\frac{2x+1}{x^2+x-2\:}dx$
$\left(6a^3-9b^2\right)\left(6a^3+9b^2\right)$
$\frac{x^2}{25}-y^4$
$\frac{5}{2}cos\left(x\right)+4=2$
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