Answer:
[tex]\large\boxed{5xy-x^2t+2xy+3x^2t=7xy+2x^2t}[/tex]
Step-by-step explanation:
[tex]5xy-x^2t+2xy+3x^2t\\\\combine\ like\ terms\\\\(5xy+2xy)+(-x^2t+3x^2t)\\\\7xy+2x^2t[/tex]
