14.5*（0.12+0.23+0.34）-（0.12+0.23+0.34+1）*4.5
=10*（0.12+0.23+0.34）+4.5*（0.12+0.23+0.34）-4.5*（0.12+0.23+0.34）-4.5
=6.9-4.5
=2.4