/ 5 4 \ \x + x + 4*x + 4/*(x + 4)
/ 4 5 \ (4 + x)*\4 + x + x + 4*x/
(4.0 + x)*(4.0 + x^4 + x^5 + 4.0*x)
/ / 3 \\ (4 + x)*\4 + x*\4 + x *(1 + x)//
6 2 4 5 16 + x + 4*x + 4*x + 5*x + 20*x
/ 2 \ / 2 \ (1 + x)*(4 + x)*\2 + x - 2*x/*\2 + x + 2*x/