bonjour
A = 11 ( n + 1 )
B = x ( x + 5 )
C = 7 t ( 2 t - 3 )
D = ( x + 5 ) ( x + 8 + 2 ) = ( x + 5 ) ( x + 10 )
E = ( 2 x - 9 ) ( 3 x + 7 + 6 - 2 x ) = ( 2 x - 9 ) ( x + 13 )
F = ( 5 x - 3 ) ( 7 x - 9 - 3 x - 4 ) = ( 5 x - 3 ) ( 4 x - 13 )
G = ( 7 x + 1 ) ( 7 x + 1 + 2 x + 5 ) = ( 7 x + 1 ) ( 9 x + 6 )
H = ( 2 a + 3 ) ( 5 a - 1 - 2 a - 3 ) = ( 2 a + 3 ) ( 3 a - 4 )
