Ta có :
\(P=\left(x-4\right)^{\left(x-5\right)^{\left(x-6\right)^{\left(x+6\right)^{\left(x+5\right)}}}}\)
Mà : x=7
\(P=\left(7-4\right)^{\left(7-5\right)^{\left(7-6\right)^{\left(7+6\right)^{\left(7+5\right)}}}}\)
\(P=9\)
Ta có P= (7-4)\(^{\left(7-5\right)^{\left(7-6\right)^{^{\left(7+6^{\left(7+5\right)}\right)}}}}\)
P=9