A=1/(3 ) – 3/(4 ) – (-3)/5 + 1/72 – 2/9 – 1/36 +1/15 B=1/5 – 3/(7 ) + 5/9 – 2/11 + 7/13 – 9/16 – 7/13 + 2/11 – 5/9 +3/7 – 1/5
A=1/(3 ) – 3/(4 ) – (-3)/5 + 1/72 – 2/9 – 1/36 +1/15 B=1/5 – 3/(7 ) + 5/9 – 2/11 + 7/13 – 9/16 – 7/13 + 2/11 – 5/9 +3/7 – 1/5