$\left(sin\left(x\right)-cos\left(x\right)\right)^2+sin\left(2x\right)$
$\left(4m^3+5n^2\right)\left(4m^3-5n^2\right)$
$\int\frac{2x+5}{x^2+5x+1}dx$
$\frac{-3t-9}{t^2-t-2}$
$+26\:por\:\left(-9\right)$
$3x^2+x^2+x\:$
$\int\sqrt{3x^2-1}dx$
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