$\int x^2\cdot sin\left(x\right)\left(\pi\right)dx$

$\left(x-1\right)\left(x+3\right)-\left(x-5\right)^2$

$\lim_{x\to5}\left(\frac{\left(1+x\right)^3-1}{x^2-25}\right)$

$\cos\:\left(2y\right)\times\:\cos\:\left(3x\right)-\sin\:\left(2y\right)\times\:\sin\:\left(3x\right)$

$6\left(3x-4\right)-5x$

$\int_0^{0.4}\left(\pi\left(e^{1x}+3\right)^2\right)dx$

$\left(y\right)^'=\frac{\left(5\sqrt{3}\left(y\right)^'-6y\right)}{2}$