Multiplication By Patterns

Algebra Level 1

992=98019992=99800199992=99980001 \large{\begin{array} { r c l } 99 ^2 & = & 9801 \\ 999^2 & = & 998001 \\ 9999^2 & = & 99980001 \\ \end{array}}

What is 999992 99999^2 ?

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