$\frac{\left(1+\cos\left(x\right)\right)}{\sin\left(x\right)}+\tan\left(x\right)=\frac{\left(1+\cos\left(x\right)\right)}{\sin\left(x\right)\cdot\cos\left(x\right)}$

$6-3z+7z$

$3\ln\left(x-6\right)=-3$

$\sin\left(33\right)=\frac{18}{x}$

$132,28+5,103+42,07$

$\lim_{x\to\infty}\left(\left(1+2x\right)^{\frac{19}{2lnx}}\right)$

$\frac{2x^3+3x^2+3x+1}{x^3-1}$