The square of (2a + b) multiplied by the square of (2a-b)

The square of (2a + b) multiplied by the square of (2a-b)

The square of (2a-b) and the square of (2a + b)
=[(2a-b)(2a+b)]²
=(4a²-b²)²
=16a^4-8a²b²+b^4
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