27+9√7

To simplify this expression, you should just evaluate each part of the expression individually since there are no like terms to combine. The expression "27 + 9√7" is already in its most simplified form since 27 is a rational number and 9√7 is an irrational number.

If the "√" symbol is not part of the expression, and the expression should be "27 + 9 * 7" instead, then you would calculate it as follows:

27 + 9 * 7 = 27 + 63 = 90

But if the original expression "27 + 9√7" is what you intended, then no further simplification is needed beyond evaluating any numerical approximations if required:

27 + 9√7 ≈ 27 + 9 * 2.64575 ≈ 27 + 23.81175 ≈ 50.81175

This is the approximate decimal value of the expression. The exact value remains "27 + 9√7".