{"result":{"text":"If space f open parentheses r close parentheses plus 1 half plus 1 third plus.... plus 1 over r and space f open parentheses 0 close parentheses equals 0 space then space the space value space of stack space sum with r equals 1 below and n on top open parentheses 2 r plus 1 close parentheses f open parentheses r close parentheses equals"},"status":"ok"}