Simplify this expression fully 6^x 2-3^x.2^x 1/6^x-1

6^x 2-3^x.2^x 1/6^x-1

I will assume it is something like

(6^x)^2 - (3^x)(2^x) ?? 1/( (6^x)^-1
= (6^x)^2 - 6^x ?? 6^x

can't make out the last part (where I have ??), missing an operator like + or - or ..