(1+1/15)+(3+1/35)+(5+1/63)+(7+1/99)+(9+1/143)+(11+1/195)

(1+3+5+7+9+11)+(1/3-1/5+1/5-1/7+1/7-1/9+...+1/13-1/15)=36+1/3-1/15=36+4/15

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