`B = 1/3 - 3/4 -(-3/5)+1/64-2/9-1/36+1/15`
`B = 1/3 - 3/4 + 3/5 + 1/64 - 2/9 -1/36 + 1/15`
`B = (1/3 - 2/9 - 1/36) + (-3/4 + 1/64) + (3/5 + 1/15)`
`B = ((12-8-1)/(36)) + (-48/64 + 1/64) + (9/15 + 1/15)`
`B = 3/36 + (-47/64) + 10/15`
`B = 1/12 - 47/64 + 2/3`
`B = (1/12 + 2/3) - 47/64`
`B = ((1+8)/(12)) - 47/64`
`B = 9/12 - 47/64`
`B= 1/64`