$2x^2+8xy+4xy^2$

$2x^2-8x^4+14x^6$

$4.58+4.83$

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

$w-15w^2+50$

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

$\lim_{x\to1}\left(\frac{\left(x^3-5x^2+4\right)}{x-1}\right)$