A l aide c pour demain svp merci

4/9+2/3-2= 4/9+6/9-18/9= -8/9
(- 33/25 )x(35/11) = - (3x11x7x5) / (5x5x11) =-21/5

4/9+2/3-2 = 4/9 + 6/9 -18/9 
                  10/9 - 18/9 = -8/9

(-33/25 X 35/11) = -1155/385 = -165/77 = - 15/7