bonjour
D = 5 ⁻³ x 2 ³ - 7/10 x 4/3
D = 1/5³ x 8 - 28/30
D = 8/125 - 28/30
D = 8/125 - 14/15
D = 8/375 - 350/375
D = - 342/375 = - 114 / 125
E = 2/7 - 42/63
E = 18/63 - 42/63
E = - 24/63 = - 8/ 21
F = 9/2 - 5/2 x 8/15
F = 9/2 - 40/30
F = 9/2 - 4/ 3
F = 27/6 - 8/6 = 19/6
G = ( 9/3 - 2/3 ) : 28/3
G = 7 /3 x 3 /28
G = 21/84 = 1 / 4
