Step 1: Identify the terms in the polynomial: 2x^2, 3x, -5, 4x^2, and -x.
Step 2: Group the like terms together. The like terms are: 2x^2 and 4x^2 (both are x^2 terms), 3x and -x (both are x terms), and -5 (the constant term).
Step 3: Add the coefficients of the x^2 terms: 2 + 4 = 6, so we have 6x^2.
Step 4: Add the coefficients of the x terms: 3 - 1 = 2, so we have 2x.