Bài 1: Tính giá trị biểu thức
1) \(\frac{84^2-16^2}{37^2-63^2}\)
2) \(199^2\)
3) \(31^2\)
4) 45.55
5) 78.82
6) \(M=3\frac{1}{117}.\frac{1}{119}-\frac{4}{117}.5\frac{118}{119}-\frac{5}{117.119}+\frac{8}{39}\)
7) \(A=4\left(3^2+1\right).\left(3^4+1\right)...\left(3^{33}+1\right)\)