# (x^2+y^2-1)*(x^2+y^2)
P[4(0,P[4(2,-1)(4,1)])(2,P[2(0,-1)(2,2)])(4,P[0(0,1)])]
# (y-x)*(x^5-2)
P[1(0,P[6(1,-2)(6,1)])(1,P[5(0,2)(5,-1)])]
