qui peut m'aider uniquement exercice 1 c,d,e , f merci beaucoupo beaucoup

C = 7-4x(-10)
C = 7+40
C = 47

D = (2-3)(-1-2)
D =(-1)x(-3)
D = 3

E = (1-7)/2+5
E = -6/7

F = -2+ (-6)x(-6) - 9
F = -2+36-9
F = 36-11
F = 25

C = 7 - 4 x (- 10)
C = 7 + 40
C = 74

D = (2 - 3) x (- 1 - 2)
D = - 2 x - 3
D = 6

E = 1 - 7
      2 + 5
E = - 6/7

F = - 2 + (- 6) x (- 6) - 9
F = - 2 + 36 - 9
F = - 11 + 36
F = 25