Just use word. There is a formula editor in word. Download and install it and you can use it. The Formula Editor command opens.

After calling the formula, click the score template to select the style, then click and enter the molecule at the blinking cursor in the formula box inserted into the document. Use the down control key (or Tab key) to move the cursor to the denominator position and enter the denominator. Double-click to exit (or activate) score editing.