Assuming it's factorization/simplify
[tex]\frac{25x-10x^2}{-15x^3-5x} \\\frac{5x(5-2x)}{-5x(3x^2+1)} \\\frac{5x(5-2x)}{-5x(3x^2+1)} \\-\frac{(5-2x)}{(3x^2+1)} \\-\frac{(-2x+5)}{(3x^2+1)} \\\frac{2x-5}{3x^2+1} \\[/tex]
If you have any questions, feel free to ask.
