$\frac{dy}{dx}\cdot\frac{e}{y}=\frac{\left(1+3\cdot x\right)\cdot e}{x}-2\cdot e$

$\frac{x^n}{6^nx^3}$

$f\left(x\right)=\left(3x^4-6x^2\right)\left(4x+2\right)$

$\sqrt{3a^2b^3}\cdot\sqrt{6a^5}b$

$\left(+23\right)-\left(-25\right)$

$y=10\ln x$

$4-8\ln\left(x\right)=9$