$\int\frac{\left(1+x\ln\left(x\right)e^x\right)}{x}dx$

$\int\sin\left(2n-1\right)x.\sin\left(2m-1\right)xdx$

$\left(x+4\right)\left(x-4\right)+\left(x+5\right)\left(x-5\right)-2\left(x+2\right)\left(x-3\right)$

$3x^{-3}dy=2y^{-2}dx$

$\left(y\right)^'+3x^2-y=x^2$

$2.\left(-3\right):\left(-1\right)$

$24x+3f-12x$