Problem Statement: 已知非零实数 a、b、c 满足条件 a+b+c=0. (Given non-zero real numbers a, b, c satisfying the condition a+b+c=0.) Request: 求: (Find:) Mathematical Expression: $\frac{(a^7 + b^7 + c^7)^2}{(a^2 + b^2 + c^2)(a^3 + b^3 + c^3)(a^4 + b^4 + c^4)(a^5 + b^5 + c^5)}$ 的值. (the value of the expression)---**Question Number:** 16. **Problem Statement:** 已知非零实数 a、b、c 满足条件 a+b+c=0. (Given non-zero real numbers a, b, c satisfying the condition a+b+c=0.) **Request:** 求: (Find:) **Mathematical Expression:** $\frac{(a^7 + b^7 + c^7)^2}{(a^2 + b^2 + c^2)(a^3 + b^3 + c^3)(a^4 + b^4 + c^4)(a^5 + b^5 + c^5)}$ 的值. (the value of the expression)