Create a lambda function called fun that takes three arguments: a, b, and c. This function should execute the same operation as described in Chapter 4 of this section. Specifically, it should multiply a by 3, multiply b by 2, add those two results to c, and then square the resulting number.

For instance, if a = 5, b = 4, and c = 3, the function should yield (5x3 + 4x2 + 3)² = 676.