Cum se rezolva asta?

Răspuns:
[tex]3^{12}/3^{6} *3*3^{2} -3^{6} \\3^{9} -3^{6} \\(3^{3} -1)*3^{6} \\(27-1)*729\\1,89 54*10^{4} =18954[/tex]