SxL搔îTWj

P/iiQ+1j^(2n-1)+1j1/28-1/124+1/244+1/344+EEE/4-3/4

P/iiQ+1j^(2n-1)-1j1/28-1/124+1/244+1/344-EEE/4-3/4

1/28`/4-3/4

΁`22/7