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.<br /><br />Given expression: $-x^{3}-3x^{2}+4x^{3}-3x^{2}+5x^{5}$<br /><br />Step 1: Group the terms with the same degree together:<br />$5x^{5} + (-x^{3} + 4x^{3}) + (-3x^{2} - 3x^{2})$<br /><br />Step 2: Simplify the grouped terms:<br />$5x^{5} + 3x^{3} - 6x^{2}$<br /><br />Therefore, the expression in standard form is $5x^{5} + 3x^{3} - 6x^{2}$.