The Microsoft Mathematics AddIn for Microsoft Word and OneNote is a free addin from Microsoft that makes it easy to to plot graphs in 2D and 3D, calculate numerical results, solve equations or inequalities, and simplify algebraic expressions in your Word documents and OneNote notebooks.
The Microsoft Mathematics Add-in can help you with the following tasks:
Compute standard mathematical functions, such as roots and logarithms
Compute trigonometric functions, such as sine and cosine
Find derivatives and integrals, limits, and sums and products of series
Perform matrix operations, such as inverses, addition, and multiplication
Perform operations on complex numbers
Plot 2-D graphs in Cartesian and polar coordinates
Plot 3-D graphs in Cartesian, cylindrical, and spherical coordinates
Solve equations and inequalities
Calculate statistical functions, such as mode and variance, on lists of numbers
Factor polynomials or integers
Simplify or expand algebraic expressions
You can download Microsoft Mathematics Add-In for Word and OneNote here.