Hints - Word 2016 - Write complex math equations with Ink Equation

Including math equations has gotten much easier. If you have a touch device, you can use your finger or a touch stylus to write math equations by hand, and Word will convert it to text. (If you don't have a touch device, you can use a mouse to write, too). You can also erase and select and correct what you've written as you go

Go to Insert > Equation > Ink Equation, any time you want to include a complex math equation in your document