$\int\left(x^2+1\right)^7dx$

$\left[\left(23-4-12\right)\left(-12\right)-\left(34-3-\left(-23\right)\right)\right]$

$8mx-5n-4mx+n$

$\ln\left(x^2\right)+\ln\left(x\right)=3$

$\int\frac{-3x}{\sqrt[3]{x^2+3}}dx$

$-24\:\cdot\:-7\:+\:67\:\cdot\:0$

$\frac{1}{4}ka-\frac{1}{8}ka$