Expanding the expression, we have:
-4u^5(-u^5) = -4u^5 * -u^5
Since we have a negative times a negative, it results in a positive:
-4u^5 * -u^5 = 4u^5 * u^5
Multiplying the coefficients, we get:
4 * 1 = 4
Multiplying the variables, we add the exponents:
u^5 * u^5 = u^(5+5) = u^10
Therefore, the simplified expression is:
-4u^5(-u^5) = 4u^10
-4u^5(-u^5)
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