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[" (fall "(b)/(b)1+2+3+4...+10=55" th "4...

[" (fall "(b)/(b)1+2+3+4...+10=55" th "41740cl^(6)" b "+12+18+24+.......60" attlat "(1)/(8)" in "],[[" a) "300," (b) "655," (c) "330," (d) "455]]

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