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a^-3/a*(a^3)^-3 a^3/a*a^-9 a^2*(1/a)^9
=(1/a)^10*(1/a)^9 = (1/a)^19
(1/4)^x=64 x=(-3), gdyż (1/4)^-3=64
Myślę, że jest dobrze, ale nie jestem pewna :D