ellfromeqn(t0*y^3+(s1+s0*x)*y^2 +(r2+r1*x+r0*x^2)*y+(q3+q2*x+q1*x^2+q0*x^3))
ellfromeqn(t0*y^2+(s0*x^2+s1*x+s2)*y+(r0*x^4+r1*x^3+r2*x^2+r3*x+r4))
ellfromeqn(t0*x^2+(s0*y^2+s1*y+s2)*x+(r0*y^4+r1*y^3+r2*y^2+r3*y+r4))
ellfromeqn((t0*x^2+t1*x+t2)*y^2+(r0*x^2+r1*x+r2)*y+(s0*x^2+s1*x+s2))
