Posted by matrix school 2 on Thursday, August 6, 2009 at 3:05pm.
integral( (e^x+ x)^2 * (e^x + 1) dx )
let u = e^x + x
du = (e^x + 1)dx
Now you have integral(u^2 du)
= (u^3)/3 +C
= ((e^x + x)^3)/3 +C
= (e^3x + 3x*e^2x + 3x^2*e^x + x^3)/3 +C
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