To keep the expression \(10^4 + 10^6\) in exponent form, you can factor out the smaller exponent, which is \(10^4\):
\[ 10^4 + 10^6 = 10^4(1 + 10^{6-4}) = 10^4(1 + 10^2) \]
So, the expression in exponent form is:
\[ 10^4(1 + 10^2) \]
You can also simplify \(1 + 10^2\):
\[ = 10^4(1 + 100) = 10^4 \cdot 101 \]
Thus, the final expression can be presented as:
\[ 10^4 \cdot 101 \]
However, if you're strictly looking to maintain the exponent form without evaluating \(1 + 10^2\) as a numeric factor, then the first factored form \(10^4(1 + 10^2)\) is the best representation in exponent form.