$\left(w+12\right)\left(w+6\right)$

$\frac{cos\left(u\right)+1}{sin\left(u\right)}+\frac{sin\left(u\right)}{1+cos\left(u\right)}$

$\left(3x^8+5\right)\left(3x^8+8\right)$

$\left(x+6\right)2x=\left(x-4\right)\left(x+4\right)$

$\frac{sin\left(180-2x\right)}{sin\left(x\right)}=1,98$

$\lim_{x\to0}\left(\frac{7x}{\sqrt{n^2+4}}\right)$