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Ответ:

[tex] \frac{ {( {a}^{ - 5} \times {b}^{2} )}^{ - 3} }{ {a}^{11} \times {b}^{ - 7} } [/tex]

[tex] \frac{{( {a}^{ - 5} )}^{ - 3} \times {( {b}^{2})} ^{ - 3} }{ {a}^{11} \times {b}^{ - 7} } [/tex]

[tex] \frac{ {a}^{ ( - 5) \times ( - 3)} \times {b}^{2 \times ( - 3)} }{ {a}^{11} \times {b}^{ - 7} } [/tex]

[tex] \frac{ {a}^{15} \times {b}^{ - 6} }{ {a}^{11} \times {b}^{ - 7} } [/tex]

[tex] \frac{ {a}^{15 - 11} \times {b}^{ - 6} }{ {b}^{ - 7} } [/tex]

[tex] \frac{ {a}^{4} \times {b}^{ - 6} }{ {b}^{ - 7} } [/tex]

[tex] {a}^{4} {b}^{ - 6 - ( - 7)} [/tex]

[tex] {a}^{4} {b}^{ - 6 + 7} [/tex]

[tex] {a}^{4} {b}^{1} [/tex]

[tex] {a}^{4} b[/tex]