$\left(4\left(4\right)^{\frac{n}{2}}\right)$

$300+\left(-60\right)-\left(-24\right)$

$5\left|7-2\left(1-9\right)-3+12\right|+4$

$\log_{10}\left(x\right)=4.579$

$[\left(-8\right)+5\cdot2-4:\left(-2\right)]\cdot\left(-7\right)$

$\int\left(\frac{\left(x^2\right)}{\sqrt{x^6+81}}\right)dx$

$\frac{4+12-x-3}{x-3}$