$\left(b^4-2a\right)^3$

$-\left(+45\right)-\left(-83\right)+\left(-95\right)+\left(+65\right)-\left(-53\right)-\left(+71\right)$

$\frac{x^4+3x^3+3x^2+2x+1}{x+1}$

$\left(9x^2+5x\right)x\left(9x^2-5x\right)$

$\left(a-6\right)^3$

$\int\frac{x+4}{\left(x^2+12x+36\right)}dx$

$\log\left(x^2-15\right)=\log\left(2x\right)$