Combine like terms and leave in Standard Form: -x^3-3x^2+4x^3-3x^2+5x^5

To combine like terms and leave the expression in standard form, we need to group the terms with the same degree together and then simplify.Given expression: Step 1: Group the terms with the same degree together: Step 2: Simplify the grouped terms: Therefore, the expression in standard form is .