WILL GIVE BRAINLIEST

Write the expression in simplest form.

Which of the following are parts of a sphere

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10