jas27950 jas27950 03-05-2024 Mathematics Answered Type the correct answer in each box. Use numerals instead of words. Simplify the following polynomial expression. $ \left(5 x^2+13 x-4\right)-\left(17 x^2+7 x-19\right)+(5 x-7)(3 x+1) $ $\square$ $x^2-$ $\square$ $x+$