[(-m^3n^2)^3)]^2*(-m^2n^3)^2

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[(-m^3n^2)^3)]^2*(-m^2n^3)^2[(-m^3n^2)^3)]^2*(-m^2n^3)^2[(-m^3n^2)^3)]^2*(-m^2n^3)^2[(-m^3n^2)^3)]^2

[(-m^3n^2)^3)]^2*(-m^2n^3)^2
[(-m^3n^2)^3)]^2*(-m^2n^3)^2

[(-m^3n^2)^3)]^2*(-m^2n^3)^2
[(-m^3n^2)^3)]^2*(-m^2n^3)^2
=(-m^3n^2)^6(m^4n^6)
=m^18n^12(m^4n^6)
=m^22n^18

[(-m^3n^2)^3)]^2*(-m^2n^3)^2
=m^18n^12*m^4n^6
=m^22n^18