$\left(9x+1\right)\left(7x-10\right)$

$896\cdot19,75$

$u\:+\:\left(v\:+\:w\right)\:=\:\left(u\:+v\right)\:+\:w$

$\int\left(\left(x^3+x^2\right)^7\left(3x^2+2x\right)\right)dx$

$36x^3\:-42x^2\:-18x$

$\frac{dy}{dx}=4xe^{6y}$

$\lim_{x\to1}\left(\frac{\left(x-1\right)^2}{-\left(\ln\left(x\right)\cdot x\right)}\right)$