$\left\{\left(-5\right)-\left[\left(+8\right)+\left(-10\right)\right]\right\}\left[\left(+8\right)+\left(-10\right)\right]$

$\left(x^3-2x^2+3x-4\right)-\left(2x^3+5x^2-4x+2\right)$

$8ba^2x+2ab^3a^2x^3-4a^2b^2a^2$

$\left(8-5b\right)^2$

$6^2+12\cdot5+5^2$

$\frac{d}{dx}\frac{u}{1+\ln\left(u\right)}$

$\left(\frac{1}{2}x-2z\right)^2$