0.2(1/2×6²-3×0.5²)

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0.2(1/2×6²-3×0.5²)0.2(1/2×6²-3×0.5²)0.2(1/2×6²-3×0.5²) 

0.2(1/2×6²-3×0.5²)
0.2(1/2×6²-3×0.5²)

0.2(1/2×6²-3×0.5²)