To obtain the math environment click on Equation on the Insert ribbon on Windows or Word for Mac 16 or in Document Elements on Word for Mac 11. To access the old equation editor choose the Insert tab on the man menu and click Object. Word 2007 does understand this format so it should be an easy go.
You will now see Equation Tools Design Ribbon.
To install this download. On the Insert tab in the Symbols group click the arrow next to Equations and then click Insert New Equation on the Insert tab in the Symbols group click the Equation button or simply press Alt. To obtain the math environment click on Equation on the Insert ribbon on Windows or Word for Mac 16 or in Document Elements on Word for Mac 11. All automatic formatting of text is disabled.