simplfy the expression

-13x^2+3x-5x²+4

To simplify the expression -13x^2 + 3x - 5x^2 + 4, we combine like terms:

-13x^2 - 5x^2 + 3x + 4

= (-13 - 5)x^2 + 3x + 4

= -18x^2 + 3x + 4

So, the simplified expression is -18x^2 + 3x + 4.