$$5 { x }^{ 4 } -3 { x }^{ 3 } +2 { x }^{ 2 } -7x+3 \sqrt{ x-1 }$$
$5x^{4}-3x^{3}+2x^{2}-7x+3\sqrt{x-1}$
$20x^{3}-9x^{2}+4x-7+\frac{3}{2\sqrt{x-1}}$
