1.4m^8+m^2÷2 2.(x+y)^3-x^3-y^3+3xy
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1.4m^8+m^2÷22.(x+y)^3-x^3-y^3+3xy1.4m^8+m^2÷22.(x+y)^3-x^3-y^3+3xy1.4m^8+m^2÷22.(x+y)^3-x^3-y^3+3xy1
1.4m^8+m^2÷2 2.(x+y)^3-x^3-y^3+3xy
1.4m^8+m^2÷2
2.(x+y)^3-x^3-y^3+3xy
1.4m^8+m^2÷2 2.(x+y)^3-x^3-y^3+3xy
1.4m^8+m^2÷2
=1/2m^2(m^6+1)
=1/2m^2(m^2+1)(m^4-m^2+1)
2.(x+y)^3-x^3-y^3+3xy
=x^3+3x^2y+3xy^2+y^3-x^2-y^2+3xy
=3x^2y+3xy^2+3xy
=3xy(x+y+1)
1.4m^8+m^2÷2 2.(x+y)^3-x^3-y^3+3xy
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