$\left(8x+\frac{3}{8}\right)\left(8x-\frac{3}{8}\right)$

$\left(x^6+4\right)\left(x^6+8\right)$

$8\cdot6+2$

$\left[\left[\frac{\left(-2\right)^4}{\left(-5\right)^4}\frac{\left(-5\right)^4}{\left(-2\right)^4}\right]^4\right]^5$

$-6\:+9\:+4\:+\:-2\:-6\:-9\:-\:-3\:-5\:-6$

$-933-158$

$2x^2-3y^2+0,24x^2y^2=950$