161 = ⌊√5⌋ + Γ5 + (Γ5 + ⌈√5⌉)x5
161 = 2 + 24 + (24 + 3)x5
161 = 26 + 27x5
161 = 26 + 135
161 = 161
for the ⌊x⌋ and ⌈x⌉ functions see the following link:
http://rapidtables.com/math/symbols/Bas ... ymbols.htmIt's floor and ceiling - or the integer directly below or above whatever fraction is inside it. So ⌊2.5⌋ is 2, ⌊10/3⌋ is 3, ⌈π⌉ is 4, etc
Hopefully they're not too vague to use....