SVP j ce devoir pour demain

E = -7/4-1/10
E = -7x5/4x5-2/2x10
E = -35/20-2/20
E = -37/20

F = -11/25+3/10
F = -11x2/2x25 + 3x5/5x10
F = -22/50+15/50
F = -7/50

G = -7/6-14/15
G = -7x5/6x5 - 14x2/15x2
G = -35/30-28/30
G = -63/30
G = -21/10

H = -7/20+-3/8
H = -7x2/2x20 - 3x5/8x5
H = -14/40-15/40
H = -29/40