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a->b->sum(i=a,b,hammingweightsumdigits(i,2))
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a->b->sum(i=a,b,hammingweight(i))
Try it online!
a->b->sum(i=a,b,sumdigits(i,2))
(a,b)->b->sum(i=a,b,hammingweight(i))
(a,b)->sum(i=a,b,hammingweight(i))
