sum from 0 to 7 (.024*.55^n*.9^(4n+1)*.952^n*.976^(3n)+.024*.55^n*.9^(4n+2)*.952^n*.976^(3n+1)+.024*.55^n*.9^(4n+3)*.952^n*.976^(3n+2)+.048*.55^n*.9^(4n+4)*.952^n*.976^(3n+3))

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