$\left(8\right)-\left(-3\right)+\left(1\right)$

$\left(2ax-a^2\right)^2$

$\frac{1}{2}\cdot\frac{u^{\frac{1}{2}}}{\frac{1}{2}}$

$tan2x-2tan2xsin^2x\:=\:sin2x$

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

$\frac{di}{dt}=\left(b-g\right)i\:-\:\frac{bi^{2\:}}{n}$

$log2\left(x^6\sqrt{\frac{y}{z^5}}\right)$