Let's do this step by step.
First, write out the problem.
5 * 2 * (-4) + 3 * 6
Remember your order of operations: PEMDAS
10 * (-4) + 3 *6 In this step I multplied five and two.
-40 + 3 * 6 In this step I multiplied ten and negative four.
-40 + 18 Here I multplied three and six and got eighteen.
-22 Finally, we added. Negative 22 is your final answer.