Trả lời:
Thay x = 7 vào P, ta được:
\(P=\left(x-4\right)^{\left(x-5\right)^{\left(x-6\right)^{\left(x+5\right)^{\left(x+6\right)}}}}\)
\(=\left(7-4\right)^{\left(7-5\right)^{\left(7-6\right)^{\left(7+5\right)^{\left(7+6\right)}}}}\)
\(=3^{2^{1^{12^{13}}}}\)
\(=9\)