If you would like to solve the following expression, you can calculate this using the following steps:
10 * x * (6 * x^2 + 7 * x + 9) = 10 * x * 6 * x^2 + 10 * x * 7 * x + 10 * x * 9 = 60 * x^3 + 70 * x^2 + 90 * x
The correct result would be 60 * x^3 + 70 * x^2 + 90 * x.