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[tex] \frac{ {19}^{12} \times {19}^{19} }{ {19}^{10} } \\ [/tex]
[tex] = {19}^{12} \times {19}^{19} \div {19}^{10} [/tex]
[tex] = {19}^{(12 \: + \: 19 ) - 10} [/tex]
[tex] = {19}^{31 - 10} [/tex]
[tex] = \tt{ \blue{ {19}^{21} }}[/tex]
[tex]\tt{ \red{Palz-!}}[/tex]