My number is Bigger! (Season 2)

999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999xgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplex

999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999xgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplex
!^^^
999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999x999999999999xgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplexxgoogolplex
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99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!^^^9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
My number is bigger because I used four up-arrows.
Rules: Using standard mathematical notation, name an exact, non-infinite number larger than the previous valid number. If you use any variables, functions, or operations unknown to us, specifiy them in the post.
A reasonable mathematician should be able to ascertain exactly which number you have made by referencing the post only and, if needed, the necessary works (ie books). The number cannot be subjective, ie changing.
Good luck! Show us all your intelligence!