What is Double integral? Triple integrals? Line & Surface integral? Volume integral?

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After watching this video you will understand that ... A line integral is the generalization of simple integral. A surface integral is generalization of double integral. A volume integral is generalization of triple integral.
0:00 Intro
0:18 Simple Integral
0:46 Double Integral
1:06 Line Integral
2:02 Double and Surface Integrals
3:01 Parametric Surface
4:48 Triple and Volume Integrals