$2xdx+x^2dv=0$
$\int6x^2e^{2x}dx$
$\left(x-3y+2z\right)\left(x-3y+2z\right)$
$5x^2+30x+225$
$100\:-\:\left[50\:-\left(20\:x\:5\right)\right]$
$\int3\sqrt{x}\log\left(x\right)dx$
$\int\left(9+sen\left(3x\right)\right)^4cos\left(3x\right)dx$
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