$\int\left(2cosh\left(u\right)\right)dx$
$-\frac{\pi}{1}$
$x^2-30x+115$
$\left(4x+3y-5z\right)\left(4x+3y-5z\right)$
$\int\frac{cosx+sen2x}{senx}dx$
$\frac{2x}{x-1}+\frac{5}{x-9}=\frac{2}{x^2-10x+9}$
$5x^2=\left(2x+3x^2\right)$
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