$6\:\left(x\:+\:1\right)\:+\:\left(-5\right)\:.\:\left(-4\right)\:=\:3\:\left(2x\:+\:4\right)\:-\:2\:.\:\left(-10\right)$

$2\cos\left(x\right)-4\sin\left(x\right)\cos\left(x\right)$

$y'+\frac{4y}{t}=t^2$

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

$172,52+13,73$

$\left(-189\right)\cdot\left(-1\right)$

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