$+9-\left(+7-12\right)+\left(+4-6\right)$

$\left(\frac{5}{x^3}\right)-\left(3x^{\left(\frac{4}{3}\right)}\right)+\left(\frac{2}{\sqrt{x}}\right)-6$

$u^2-6u+u$

$-x^2>1$

$\int\left(\frac{3}{\sqrt{1-25x^2}}\right)dx$

$\sin\left(2x\right)=-\frac{1}{\sqrt{2}}$

$5x=4y\sqrt{x^2+1}\left(\frac{dy}{dx}\right)$