4×(-1/2²)-3/2×(-2/5)

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4×(-1/2²)-3/2×(-2/5)4×(-1/2²)-3/2×(-2/5)4×(-1/2²)-3/2×(-2/5)-2/5

4×(-1/2²)-3/2×(-2/5)
4×(-1/2²)-3/2×(-2/5)

4×(-1/2²)-3/2×(-2/5)
-2/5