Explicație pas cu pas:
[tex]( {7}^{18} \times {7}^{2} - {7}^{18} - \times {7}^{1} + {7}^{18} ) \div {7}^{18} = \\ {7}^{18} \times ( {7}^{2} - {7}^{1} + 1) \div {7}^{18} = \\ {7}^{18} \times (49 - 7 + 1) \div {7}^{18} = \\ {7}^{18} \times 43 \div {7}^{18} = \\ 43[/tex]
