• Integral calculus is soï»¿ much fun.

• Yeaï»¿ this guy rules.

• if you use u= 1+X^2, thenï»¿ du/dx = 2xdx

Since the problem has "x^2" in the numerator, it will be impossible to cancel out an "x" using the given du/dx since you cannot bring variables outside the integral. (only constants may move outside the integral)

He goes over it quickly around 4:00

• Review of polynomial long division.ï»¿ Bonus!

• I dont understandï»¿ in the first explample how is that equals to tan^-1x :s

• ....just in case you were stillï»¿ wondering....

• There is no possibleï»¿ substitution. So all he did was rewrite it algebraically by expressing x^2/(1+x^2) in a different form.

• this isï»¿ awesome

• i dont get the trick inï»¿ the last integral too

• THANKS OLD MAN..THANKSï»¿ MATH TV

• Can someone help me. I got this question which I can't solveï»¿ (I'm not really good at this). Anyway, I have here: {(X+6) / (X+2)^2} dx and I have to find the integral of it...well our teacher said it's quite challenging and it really is...can someone care to help?

• @arod889 he said it cant be done if youre talking about the lastï»¿ one