(7+y)(7-y)+4y+y^2=49+4y=49+4*0,2=49.8
49-(y^2+4y+y^2)^2=49-4y^4-16y^3-16y^2=49-4*(0,2)^4-16*(0,2)^3-16*(0,2)^2=48.2256
(7+y)(7-y)+4y+y^2=49+4y=49+4*0,2=49.8
49-(y^2+4y+y^2)^2=49-4y^4-16y^3-16y^2=49-4*(0,2)^4-16*(0,2)^3-16*(0,2)^2=48.2256