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-4my-2m
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m\left(-2\right)y-2\left(m+ym\right)
Combine y and -3y to get -2y.
m\left(-2\right)y-2m-2ym
Use the distributive property to multiply -2 by m+ym.
-4my-2m
Combine m\left(-2\right)y and -2ym to get -4my.
m\left(-2\right)y-2\left(m+ym\right)
Combine y and -3y to get -2y.
m\left(-2\right)y-2m-2ym
Use the distributive property to multiply -2 by m+ym.
-4my-2m
Combine m\left(-2\right)y and -2ym to get -4my.
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