bonjour

6 x = 6 * x

3 ( a + 1) = 3 *a + 3 * 1

8.2 x = 8.2 * x

6 x + 3  = 6 * x + 3

15 - 3 b = 15 - 3 * b

ab = a * b

x² = x * x

10 x³  10 * x  * x * x

4 x² + 6 x - 7 = 4 * x * x + 6 * x - 7