[tex](42 : 14) ^{2} \times {9}^{18} : {27}^{6} = \\ \\ {(42 : 14)}^{2} \times { {(3}^{2}) }^{18} : { {(3}^{3}) }^{6} = \\ \\ {(42 : 14)}^{2} \times {3}^{2 \times 18} \div {3}^{3 \times 6} = \\ \\ {(42 : 14)}^{2} \times {3}^{36} : {3}^{18} = \\ \\ {(42 : 14)}^{2} \times {3}^{18} = \\ \\ {3}^{2} \times {3}^{18} = \\ \\ {3}^{2 + 18} = \\ \\ {3}^{20} [/tex]
