Bonjour
2 x a + 5 x c = 2a + 5c
a x d + 5 x 8 = ad + 40
38 * (3 + 2 * c) = 38 * (3 + 2c) = 114 + 76c
3 * z - 0 * b = 3z
a * 11 - 1 * t = 11a - t
a * (13 * 9 + b * n) = a * (117 + bn) = 117a + abn.
