Question 269160
Here's a step by step multiplying 
-4*(-5)*(-4)*(-7)

Multiply all the factors separated by a * in -4*(-5)*(-4)*(-7).
-4(-5)(-4)(-7)

Multiply -5 by -4 to get 20.
-4(20)(-7)

Multiply 20 by -7 to get -140.
-4(-140)

Multiply -4 by each term inside the parentheses.
Answer: 560
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