Simplify the expression sqrt(7! + 6!), where n! stands for n(n-1)(n-2) ... 2*1.
The expression simplifies as such:
6!(1+7)
6!*8
6*5*4*3*2*1*8
3*2*5*2*2*3*2*8
2*2*2*2*2*2*2*3*3*5
2^7*3^2*5
2^6*3^2*15
\(2^3\cdot3\sqrt{15}\)
Try to finish it yourself.
