1/2+（1/3+2/3）+（1/4+2/4+3/4）+…+（1/60+2/60+…+58/60+59/60）=1V4w:a/u7G6t:W3o(N)z/^(e8`6C'n7q,o'J5}5S'G6K
算式：提示;R1c;g6E0C't2i9`2T8C/^(e8`6C'n7q,o'J5}5S'G6K