1.) 4(x-7)
The difference = subtraction; put what comes after the multiplication( or whatever type of math) in parenthesis if you’re multiplying by another equation (ex. 5(2-5) )
2.) 4x-7
Less than= subtraction
3.) 4x+7
Sum=addition
4.) 7-4x
Minus= subtraction , times= multiplication
Hope this helps!