$$\frac{0.8}{5-0.8}+\frac{0.7}{5-0.7}+\frac{0.5}{5-0.5}; \frac{(0.8)^{2}}{5-0.8}+\frac{(0.7)^{2}}{5-0.7}+\frac{(0.5)^{2}}{5-0.5}+2$$
