`A=(3sqrt(18) + 2sqrt(50) - 4sqrt(72)) : 8sqrt(2)`
`A=(9sqrt(2)+10sqrt(2)-24sqrt(2)): 8sqrt(2)`
`A=19sqrt(2)-24sqrt(2)): 8sqrt(2)`
`A=-5sqrt(2):8sqrt(2)`
`A=-5/8`
`B=(-4sqrt(20) + 5sqrt(500) - 3sqrt(45) ) :sqrt(5)`
`B=(-8sqrt(5)+50sqrt(5)-9sqrt(5)):sqrt(5)`
`B=42sqrt(5)-9sqrt(5)):sqrt(5)`
`B=33sqrt(5):sqrt(5)`
`B=33`