Hoặc
Tính (1256)−0,75+(127)−43
(1256)−0,75+(127)−43=(1256)−34+(127)−43
=25634+2743=4√2563+3√274=4√(28)3+3√(33)4=4√224+3√312=4√(26)4+3√(34)3=26+34=64+81=145.