Bonjour
3(a + 7) => oui
= 3 * a + 3 * 7
= 3a + 21
7 + (2b + 3) => non
5 * (a x b) => oui
= 5 * a + 5 * b
= 5a + 5b
(x - 4) * 2 => oui
= x * 2 - 4 * 2
= 2x - 8
4(2 + x) => oui
= 4 * 2 + 4 * x
= 8 + 4x
6(2y - 1) => oui
= 6 * 2y - 6 * 1
= 12y - 6
