8m(m²-3m+4)-m²(m-3)=?7x(2x-1)-3x(4x-1)-2x(x+3)=?（-2a²b)²（ab²-a²b+a三次方=?-(-x)²(-2x²y)三次方+2x²（x六次方y三次方-1)?

8m(m²-3m+4)-m²(m-3)=?7x(2x-1)-3x(4x-1)-2x(x+3)=?（-2a²b)²（ab²-a²b+a三次方=?-(-x)²(-2x²y)三次方+2x²（x六次方y三次方-1)?
8m(m²-3m+4)-m²(m-3)=?
7x(2x-1)-3x(4x-1)-2x(x+3)=?
（-2a²b)²（ab²-a²b+a三次方=?
-(-x)²(-2x²y)三次方+2x²（x六次方y三次方-1)?

8m(m²-3m+4)-m²(m-3)=?7x(2x-1)-3x(4x-1)-2x(x+3)=?（-2a²b)²（ab²-a²b+a三次方=?-(-x)²(-2x²y)三次方+2x²（x六次方y三次方-1)?
8m(m²-3m+4)-m²(m-3)
=8m^3-24m^2+32m-m^3+3m^2
=7m^3-21m^2+32m
7x(2x-1)-3x(4x-1)-2x(x+3)
=14x^2-7x-12x^2+3x-2x^2-6
=-4x-6
（-2a²b)²（ab²-a²b+a三次方)
=4a^4b^2（ab²-a²b+a三次方)
=4a^5b4-4a^6b^3+4a^7b^2
-(-x)²(-2x²y)三次方+2x²（x六次方y三次方-1)
=-x^2(-8x^6y^3)+2x²（x六次方y三次方-1)
=8x^8y^3+2x^8y^3-2x^2
=10x^8y^3-2x^2