Step 1 :Calculate the antiderivative of the function: \(x^4 - \frac{6}{\pi}\cos\left(\frac{\pi}{2}x\right)\)
Step 2 :Evaluate the antiderivative at the upper limit of 2: \(16 + \frac{6}{\pi}\)
Step 3 :Evaluate the antiderivative at the lower limit of -2: \(16 + \frac{6}{\pi}\)
Step 4 :Subtract the lower limit evaluation from the upper limit evaluation: \(0\)
Step 5 :The solution to the integral is \(\boxed{0}\)