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[tex] {10}^{2} + {2}^{7} 10[/tex]
[tex] {4}^{3} \times 15 - {15}^{2} [/tex]
[tex] {13}^{2} + {5}^{3} \times 13[/tex]
[tex]23 \times {3}^{5} - {23}^{2} [/tex]