$5x^2''$

$3a-3\left(b-4\right)\left|c+2\right|\left(a-b+3c\right)-\left(a+5c-2b\right)$

$\log\left(x\right)-\log\left(x+6\right)=\frac{1}{2}\log\left(9\right)$

$4-3\cdot6-6\cdot7$

$\int\frac{1}{x^2\left(x^2+16\right)}dx$

$\left(-1\:\right)\:+\:\left(-18\right)\:-\:\left(-16\right)+\:\left(\:-\:3\right)$

$\frac{2x+4y^3-6x+y^3}{3x^2+6xy^3}$