Ответ:

[tex] - 125x {}^{7} y {}^{5} ( - 5 {x}^{3} y) {}^{3} [/tex]

[tex] - 125 {x}^{7} {y}^{5} ( - (5 {x}^{3} y) {}^{3} )[/tex]

[tex]125 {x}^{7} {y}^{5} (5 {x}^{3} y) {}^{3} [/tex]

[tex](5 {x}^{3} y) {}^{3} \\ {5}^{3} ( {x}^{3} ) {}^{3} y {}^{3} \\ 125 {x}^{9} {y}^{3} [/tex]

[tex]125 {x}^{7} {y}^{5} \times 125 {x}^{9} {y}^{3} [/tex]

[tex]15625 {x}^{7} {y}^{5} {x}^{9} {y}^{3} [/tex]

[tex]15625 {x}^{7 + 9} {y}^{5 + 3} = 15625 {x}^{16} {y}^{8} [/tex]

в

в первам ва втаром ни знаю