[tex] {7}^{45} \times {7}^{55} \div ( {7}^{20} ) ^{5} + {14}^{31} \div {7}^{31} \div {2}^{28} =[/tex]
[tex] {7}^{45} \times {7}^{55} \div {7}^{20 \times 5} + {1}^{28} = [/tex]
[tex] {7}^{45} \times {7}^{55} \div {7}^{100} + 1 = [/tex]
[tex] {7}^{45} \times {1}^{45} + 1 = [/tex]
[tex] {7}^{90} + 1 = {8}^{90} [/tex]
