Help me
Developper et reduire
1) 3(X+3Xcarré-5) - (-2X+3) =

2) (2X+7) +3(5X-3) =

3) 2X(3X+2) - (-Xcarré+3X-2) =

4) 6 + 5(2a + 3b - 4c) - abc =​