$\left(4a^2+1\right)\left(2a+1\right)\left(4a\:2\:+1\right)\left(2a+1\right)$

$\sqrt{2}\cdot\sqrt{7}\cdot\sqrt{3}\sqrt{2}\cdot\sqrt{7}\cdot\sqrt{3}$

$\lim_{h\to0}\left(\frac{\left(x^2-3x+h\right)-\left(x^2-3x\right)}{h}\right)$

$-\sqrt{8}$

$y=\frac{e^{-x}cos^2\left(x\right)}{4x^2+5x+7}$

$\left|6-\left(-1\right)\right|$

$\left(7x^2+x-3\right)^2$