$\left(14x^2+8x-7y+1\right)-\left(2x^2+2x-4y+2\right)$

$\sqrt{32^{3\sqrt{a^9b^8}}}$

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

$\left(x-62\right)^2$

$\lim_{x\to0}\left(\frac{x^2-x}{\left|x\right|}\right)$

$a-a^2$

$\frac{sin\left(x\right)\cdot\left(1+sin\left(x\right)\right)}{1-cos^2\left(x\right)}-1$