y2−10y−25y^{2}-10 y-25y2−10y−25
y2+10y+25y^{2}+10 y+25y2+10y+25
y2+10y−25y^{2}+10 y-25y2+10y−25
y2−10y+25y^{2}-10 y+25y2−10y+25