How do you combine like terms and simplify the following 7x 3y-2 6x-1-y?

What is the standard form for the equation (-6x1y) m-4?

Well, it is hard to answer your question . . . "(-6x1y)m-4" is not an equation, you see. To be an equation, the formula needs to have an equals sign. Example: 6x+27 -17 = 32 is an equation and can be solved. However, your stated formula can be better written like this: m-4 (-6y)