Answer
$6m^3+4m^2n-mn^2$
Work Step by Step
Combine like terms to obtain:
$=6m^3+(3m^2n+m^2n)+(4mn^2-5mn^2)
\\=6m^3+4m^2n+(-mn^2)
\\=6m^3+4m^2n-mn^2$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.