bonsoir
A = 7 - V12 - 8 + 3 V27
A = 7 - V 4 * V3 - 8 + 3 V 9 * V3
A = 7 - 2 V 3 - 8 + 9 V 3
A = - 1 + 7 V 3
B = 3 V 25 * V 2 - V49 + 2 V 4 * V 2
B = 15 V2 - 7 + 4 V 2
B = - 7 + 19 V 2
C = 2 V 9 * V 2 + V 16 - 7 V 81
C = 6 V 2 + 4 - 63
C = - 59 + 6 V 2
D = V 3 ( 5 - V 3 ) ( V 3 + 3 )
= ( 5 V 3 - 3 ) ( V 3 + 3 )
= 15 + 15 V 3 - 3 V 3 - 9
= 6 + 12 V 3