b = s + 6
a = s^2 + 5*s + 6
[x,y] = axbyc(a,b,1+s)
[x,y] = axbyc(a,b,(1+s)^2)
[x,y] = axbyc(a,b,(1+s)^3)
[x,y] = axbyc(a,b,(1+s)^4)
[x,y] = axbyc(a,b,(1+s)^4, 'minx')
[x,y] = axbyc(a,b,(1+s)^4, 'miny')
[x,y,f,g] = axbyc(a, b, 1+s)
