x1+2*x2+2*x3+2*x4+2*x5+2*x6+2*x7+2*x8+2*x9+2*x10+2*x11+2*x12+2*x13+2*x14+2*x15-1
x1^2+2*x2^2+2*x3^2+2*x4^2+2*x5^2+2*x6^2+2*x7^2+2*x8^2+2*x9^2+2*x10^2+2*x11^2+2*x12^2+2*x13^2+2*x14^2+2*x15^2-x1
2*x1*x2+2*x2*x3+2*x3*x4+2*x4*x5+2*x5*x6+2*x6*x7+2*x7*x8+2*x8*x9+2*x9*x10+2*x10*x11+2*x11*x12+2*x12*x13+2*x13*x14+2*x14*x15-x2
x2^2+2*x1*x3+2*x2*x4+2*x3*x5+2*x4*x6+2*x5*x7+2*x6*x8+2*x7*x9+2*x8*x10+2*x9*x11+2*x10*x12+2*x11*x13+2*x12*x14+2*x13*x15-x3
2*x2*x3+2*x1*x4+2*x2*x5+2*x3*x6+2*x4*x7+2*x5*x8+2*x6*x9+2*x7*x10+2*x8*x11+2*x9*x12+2*x10*x13+2*x11*x14+2*x12*x15-x4
x3^2+2*x2*x4+2*x1*x5+2*x2*x6+2*x3*x7+2*x4*x8+2*x5*x9+2*x6*x10+2*x7*x11+2*x8*x12+2*x9*x13+2*x10*x14+2*x11*x15-x5
2*x3*x4+2*x2*x5+2*x1*x6+2*x2*x7+2*x3*x8+2*x4*x9+2*x5*x10+2*x6*x11+2*x7*x12+2*x8*x13+2*x9*x14+2*x10*x15-x6
x4^2+2*x3*x5+2*x2*x6+2*x1*x7+2*x2*x8+2*x3*x9+2*x4*x10+2*x5*x11+2*x6*x12+2*x7*x13+2*x8*x14+2*x9*x15-x7
2*x4*x5+2*x3*x6+2*x2*x7+2*x1*x8+2*x2*x9+2*x3*x10+2*x4*x11+2*x5*x12+2*x6*x13+2*x7*x14+2*x8*x15-x8
x5^2+2*x4*x6+2*x3*x7+2*x2*x8+2*x1*x9+2*x2*x10+2*x3*x11+2*x4*x12+2*x5*x13+2*x6*x14+2*x7*x15-x9
2*x5*x6+2*x4*x7+2*x3*x8+2*x2*x9+2*x1*x10+2*x2*x11+2*x3*x12+2*x4*x13+2*x5*x14+2*x6*x15-x10
x6^2+2*x5*x7+2*x4*x8+2*x3*x9+2*x2*x10+2*x1*x11+2*x2*x12+2*x3*x13+2*x4*x14+2*x5*x15-x11
2*x6*x7+2*x5*x8+2*x4*x9+2*x3*x10+2*x2*x11+2*x1*x12+2*x2*x13+2*x3*x14+2*x4*x15-x12
x7^2+2*x6*x8+2*x5*x9+2*x4*x10+2*x3*x11+2*x2*x12+2*x1*x13+2*x2*x14+2*x3*x15-x13
2*x7*x8+2*x6*x9+2*x5*x10+2*x4*x11+2*x3*x12+2*x2*x13+2*x1*x14+2*x2*x15-x14
