$\frac{d}{dx}\left(7x-3x\cdot\ln\left(x\right)\right)$

$\left(2x+\frac{1}{3x}\right)^2$

$\lim_{x\to\infty}\left(ln9x-ln\left(x+1\right)\right)$

$\sqrt[3]{\left(-4.001\right)^2+5\left(-4.001\right)-4}$

$2x\sqrt{x}+\frac{x^2+1}{2\sqrt{x}}$

$5x^2+x+6+x^2-2x+1$

$128f^2-162$