18. Oblicz:

a) (1 3/4^⁶)*(2/7)⁶
b) (0,8)⁴ : (2⅔/)⁴
c) (4 1/2^3*(-2/3)^3*(-2)3
d) (2 1/2)⁴*0,6⁴÷ (-15)⁴
plisss na teraz​