is this right?? [ (a^2 b)^n / c^3n X (ac^n)^3 / b^3 ] = [ (a^2n b^n) / c^3n X (a^3 c^3n) / b^3 ] = [ (a^5n b^n c^3n) / c^3n b^3 ] = [ (a^5n b^n ) / b^3 ]