nKrynka 1)  2*3^(log(3) 4 - 5 = 2*4 - 5 = 3
2)  6^(log(6) 4 - 169^(log(13) 3 = 4 - 9 = - 5
3) 4log(4) (2√2) = log(4) [(2√2)^4] = log(4) 64 = log(4) (4^3) = 3*log(4) = 3
4) log(1/2) 18 + log  72 + 5^(log(5) 2 =