$\lim_{x\to+\infty}\sqrt{x-2}\cdot e^{-4\cdot\left(x-2\right)^2}-\frac{\sin\left(5x\right)}{x}$

$\left(-5\right)\left(-2\right)\left(8\right)\left(4\right)$

$\left(-6x-7\right)\cdot\left(x+1\right)$

$\lim_{x\to3}\left(\frac{3-x}{1-\sqrt{4-x}}\right)$

$\frac{y}{xz\left(x+y\right)}+\frac{z}{xy\left(y+z\right)}+\frac{x}{yz\left(x+z\right)}$

$\tan\left(x-\tan\left(x\right)\right)=0$

$\left(8-9\right)-6-2\left(-4-7\right)$