Question 486224
These just expressions, not equations, that you can solve (no equal sign)
:
-2(3x^2 + x + 1) +6(-3x^2 -2x -2) 
multiply what's inside the bracket, remove the brackets
-6x^2 - 2x - 2 -18x^2 - 12x - 12
combine like terms
-6x^2 - 18x^2 - 2x - 12x - 2 - 12
-24x^2 - 14x - 14
:
:
(3y^3 - 4y +2) + (2y+1) - (y^3 - y^2 +4)
remove the brackets, no change if positive, if negative change the signs
3y^3 - 4y + 2 + 2y + 1 - y^3 + y^2 - 4
Combine like terms
3y^3 - y^3 + y^2 - 4y + 2y + 2 + 1 - 4
2y^3 + y^2 - 2y - 1