$y'=4x+6$

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

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

$y\sqrt{2a}\cdot\frac{1}{a}\sqrt{5a}$

$\lim_{x\to0}\left(\frac{\sqrt{7+x}-\sqrt{5}}{x}\right)$

$\sqrt[2]{-25}$

$\left(\frac{2x}{y}+0.1a\right)\left(\frac{2x}{y}-0.1a\right)$