\(\left(5^{1995}-5^{1993}\right):\left(5.5^{1992}\right)=\left(5^{1995}-5^{1993}\right):5^{1993}=\left(5^{1995}-5^{1993}\right)\times\frac{1}{5^{1993}}\)
\(=\left(5^{1995}\times\frac{1}{5^{1993}}\right)-\left(5^{1993}\times\frac{1}{5^{1993}}\right)=\frac{5^{1995}}{5^{1993}}-\frac{5^{1993}}{5^{1993}}=5^2-1=25-1=24\)