Integration can be thought of as the inverse of differentiation.

In the initial video I introduce you to this concept and explain the notation used.

What is integration ? - Introduction (tutorial 1) - youtube Video

Fractional and root type terms

Integrals that contain one term where x is in the denominator can often be rearranged and then integrated.

Calculus : Integration : fractional & root types (tutorial 2) : ExamSolutions - youtube Video