Problem

1. $-3 \cdot(-7) \cdot(-15) \cdot(-5)$

Answer

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Answer

\(\boxed{1575}\)

Steps

Step 1 :Multiply the given numbers: \(-3 \cdot(-7) \cdot(-15) \cdot(-5)\)

Step 2 :Since there are four negative numbers, the result will be positive: \(3 \cdot 7 \cdot 15 \cdot 5\)

Step 3 :Calculate the result: \(3 \cdot 7 \cdot 15 \cdot 5 = 1575\)

Step 4 :\(\boxed{1575}\)

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