2 3 / 7 5\ / 3\ \m *n / *\m*n /
(m^7*n^5)^2*(m*n^3)^3 при m = -1
(m^7*n^5)^2*(m*n^3)^3
((-1)^7*n^5)^2*((-1)*n^3)^3
((-1)^7*n^5)^2*(-n^3)^3
-n^19
17 19 m *n
m^17*n^19