a= -1^100+2^101+(-3)^102+4^103
U(a)=U[-1^100+2^101+(-3)^102+4^103]
U(-1^100) =1
U(2^101)=U(2^1)=2
U(-3^102)=U(3^2)=9
U(4^103)=U(4^3)=U(64)=4
=>U(a)=U(1+2+9+4)=U(16)=6
a = (-1)¹⁰⁰+2¹⁰¹+(-3)¹⁰²+4¹⁰³
u(-1)¹⁰⁰ = 1
u(2¹⁰¹) = u(2¹) = 2
u((-3)¹⁰²) = u(3¹⁰²) = u(3²) = 9
u(4¹⁰³) = u(4³) = 4
u(a) = 1 + 2 + 9 + 4 = 16
u(a) = 6
