(-$$\frac{1}{2}$$a²)⁴ = (-$$\frac{1}{2}$$)⁴ × (a²)⁴ = $$\frac{1}{16}$$ × a2 × 4 = $$\frac{1}{16}$$a⁸
Ответ: $$\frac{1}{16}$$a⁸