2 *х+3/х^2+2+2*х^2+2/х+3=5

2*(x+3/x^2)+2+2x^2+(2/x)+3=5
2x^2+5+(2/x)+(2(x+3)/x^2)=5
2x^2+5+(2/x)+(2x+6/x^2)=5
(2x^4+5x^2+2x+2x+6)/x^2=5
(2x^4+5x^2+4x+6)/x^2=5
2x^4+5x^2+4x+6=5x^2
2x^4+5x^2+4x=5x^2-6
2x^4+4x=-6
x^4+2x+3=0
x^4+2x=-3