`a=-0.8;b=1.4;`

`deff('y=F(x)','y=(7/4)*x^4-(8/3)*x^3-(3/2)*x^2+3*x');`

`F(b)-F(a)`

`integrate('7*x^3-8*x^2-3*x+3','x',a,b)`

Read more on x-engineer.org

`a=-0.8;b=1.4;`

`deff('y=F(x)','y=(7/4)*x^4-(8/3)*x^3-(3/2)*x^2+3*x');`

`F(b)-F(a)`

`integrate('7*x^3-8*x^2-3*x+3','x',a,b)`

Read more on x-engineer.org

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