Răspuns :
[3la5+(2³)la18:2la52+3la20:3la20]:31=
(3la5+2la54:2la52+1):31=
(3la5+2²+1):31=
(243+4+1):31=248:31=8
(3la5+2la54:2la52+1):31=
(3la5+2²+1):31=
(243+4+1):31=248:31=8
[3la a 5 +(2 la a3)la a 18 :2 la puterea 52+3 la puterea20:3 la puterea 20]:31=
(3 la a5+2 la puterea 54:2 la putere 52+1):31=
(3 la a 5+2 la a2+1):31=
(243+4+1):31=
248:31=8