What is the missing exponent in the following equation?

e?e65 = e38

The missing exponent in the equation is -27.

To find the missing exponent, we can set up an equation using the properties of exponents.

The property we can use is: When multiplying two exponents with the same base, you add the exponents.

In the given equation, we have e?e65 = e38.

Since the bases on both sides are the same, we can set up the equation: ? + 65 = 38.

To solve for the missing exponent, we can subtract 65 from both sides: ? = 38 - 65.

Calculating this gives us: ? = -27.

Therefore, the missing exponent is -27.