3*8+1-{4+[15*(8-5*a)+23]:4}=4
24+1-4+[15*(8-5*a)+23]=4:4=1
24+1-4+15*(8-5*a)=23+1=24
1-4+15*(8-5*a)=24-24=0
4+15*(8-5*a)=1-0=1
15*(8-5*a)=4+1=5
8-5*a=15:5=3
5*a=8-3=5
a=5:5
a=1
Verificare:
3*8+1-{4+[15*(8-5*1)+23]:4}=
24+1-{4+[15*(8-5)+23]:4}=
24+1-{4+[15*3+23]:4=
25-{4+[45+23]:4}=
25-{4+68:4}=
25-{4+17}=
25-21=
=4
Coroanã?