What is the missing term?

minus, 3−3 minus, 3, x−3x 66
2, x2x question mark? minus, 4, x−4x
xx minus, 2−2

To determine the missing term, we need to analyze the pattern in the given terms.

The second term is "3−3", which simplifies to "0". The third term is "3, x−3x". It seems that each term has "x" and "-3x" as the last two parts.

Similarly, the fifth term is "4, x−4x", with "x" and "-4x" as the last two parts.

Based on this pattern, the missing term should have "xx" as the last two parts. Therefore, the missing term is "xx".