Question 377943
Recall that the degree of a polynomial (possibly multivariable) is the largest sum of the powers of the variables' exponents. For example, {{{x^3 + 4x + 2}}} has degree 3, while {{{x^2y^5 + xy^4 + z}}} has degree 7.

Since the exponents of a polynomial must be nonnegative integers (by definition), it is impossible for four variables w,x,y,z to exist in the same term. However, a four-variable polynomial such as {{{wxy + z^2}}} satisfies, as it has degree 3.