You may use System.Math class for most scenarios you will use mathematics.
In Trivial.Maths namespace of Trivial.Maths.dll library.
Get the result of simple linear regression by initializing an instance of SimpleLinearRegressionResult value type with parameters intercept and slop. Then GetX(double y) and GetY(double x) methods can be used to get the point value.
Get gaussian mixture models by calling GaussianMixtureModelItem.Calculate(int count, double[] data, int maxIterations = 100, double tolerance = 1e-6, Random random = null) function.
Use functions in CollectionOperations static class to calculate number collections.