$7x+9=6x-5$

$\left(-56\right)-\left(-75\right)+\left(-100\right)-\left(+52\right)+\left(+75\right)-\left(+80\right)+\left(-25\right)$

$-\frac{2}{3}+4x\ge0$

$3.\left(-8\right)+\:\left(-12\right):\left(-3\right)-\left(-5\right)$

$2m-4^2$

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

$\int\frac{1}{5}\:ln\left(5ln\left(x\right)\right)dx$