28x to the 5 power w to the 2 power and 13v x w to the 3 power
Use ^ for powers
28x^5 w^2 "and" 13v w^3
If by "and" you mean multiply, then yoiu wind up with
28*13 v w^5 x^5
28x^5 w^2 "and" 13v w^3
If by "and" you mean multiply, then yoiu wind up with
28*13 v w^5 x^5