Find all values of w for which the expression is undefined.

To find the values of 'w' for which the expression is undefined, you would need to share the actual expression with me. Expressions can be undefined for various reasons depending on the operators used in the expression. For instance, expressions that include division by zero or the square root of a negative number are undefined in the realm of real numbers. To assist you further with finding the values of 'w' that render an expression undefined, please provide the specific expression.

In general, when an expression is said to be undefined, it means that it does not have a valid value under the given conditions or within a particular number system. Here are some common reasons an expression can be undefined:

1. Division by zero: Any expression that involves division where the denominator is zero is undefined. For example, in the expression 1/(w - 2), if w = 2, the expression is undefined because you would have a division by zero.

2. Square roots of negative numbers: In the system of real numbers, the square root of a negative number is not defined because no real number multiplied by itself gives a negative result. For example, √(w + 5) is undefined if w < -5 because the radicand (what's inside the square root) is negative.

3. Logarithms of non-positive numbers: The logarithm of zero or a negative number is undefined in the real number system. For example, log(w - 1) is undefined if w ≤ 1.

If the expression you have in mind involves any of these or other operations with specific constraints, those constraints will dictate what values of 'w' make that expression undefined.