  We discuss a progress in calculations of Feynman integrals based on the
Gegenbauer Polynomial Technique and the Differential Equation Method. We
demonstrate the results for a class of two-point two-loop diagrams and the
evaluation of most complicated part of O(1/N^3) contributions to critical
exponents of \phi^4-theory. An illustration of the results obtained with help
of above methods is considered.
