$cos\left(x\right)\frac{dy}{dx}-tan\left(x\right)y=7tan\left(x\right)$

$4x\left(x+3\right)\ge-5$

$\int\frac{1}{x\sqrt{25x^2-36}}dx$

$\left(\frac{1}{2}+\sqrt{a}\right)^5$

$-x^2=-x-2$

$\left(1+\frac{2}{x}\right)^4$

$\left(4\sqrt{x}+\sqrt{2}\right)\left(5\sqrt{x}-\sqrt{6}\right)$