IM=[[(-32)/(16*b^2-1),(4)/((4*b+1)*x5),0,(-4*b-4)/((4*b+1)*x5^2)],[(-4)/((4*b+1)*x5),(4*b)/((4*b+1)*x5^2),0,((-64*b^2-48*b+4)*x5^2+((128*b^2+112*b-4)*x2+32*b^2+36*b+1)*x5+(-64*b^2-64*b)*x2^2+(32*b^2+32*b)*x2-4*b^2-4*b)/((64*b+16)*x5^5+((-128*b-32)*x2-32*b-8)*x5^4+((64*b+16)*x2^2+(-32*b-8)*x2+4*b+1)*x5^3)],[0,0,0,(-4)/(16*x5^3+(-32*x2-8)*x5^2+(16*x2^2-8*x2+1)*x5)],[(-4*b+4)/((4*b+1)*x5^2),((64*b^2-80*b-4)*x5^2+((-128*b^2+144*b+4)*x2-32*b^2+28*b-1)*x5+(64*b^2-64*b)*x2^2+(-32*b^2+32*b)*x2+4*b^2-4*b)/((64*b+16)*x5^5+((-128*b-32)*x2-32*b-8)*x5^4+((64*b+16)*x2^2+(-32*b-8)*x2+4*b+1)*x5^3),(4)/(16*x5^3+(-32*x2-8)*x5^2+(16*x2^2-8*x2+1)*x5),((-1024*b^3+512*b^2+1024*b-32)*x5^4+((4096*b^3-1536*b^2-4224*b+64)*x2+1024*b^3-128*b^2-1120*b-16)*x5^3+((-6144*b^3+1536*b^2+6400*b-32)*x2^2+(-1024*b^3-256*b^2+896*b-16)*x2-384*b^3-32*b^2+400*b+6)*x5^2+((4096*b^3-512*b^2-4224*b)*x2^3+(-1024*b^3+384*b^2+1120*b)*x2^2+(-256*b^3-96*b^2+232*b)*x2+64*b^3+8*b^2-62*b)*x5+(-1024*b^3+1024*b)*x2^4+(1024*b^3-1024*b)*x2^3+(-384*b^3+384*b)*x2^2+(64*b^3-64*b)*x2-4*b^3+4*b)/((1024*b+256)*x5^8+((-4096*b-1024)*x2-1024*b-256)*x5^7+((6144*b+1536)*x2^2+(1024*b+256)*x2+384*b+96)*x5^6+((-4096*b-1024)*x2^3+(1024*b+256)*x2^2+(256*b+64)*x2-64*b-16)*x5^5+((1024*b+256)*x2^4+(-1024*b-256)*x2^3+(384*b+96)*x2^2+(-64*b-16)*x2+4*b+1)*x5^4)]];