1 2 4 -12 2 4 33 4 8 2r3-r2-r1,r2-2r11 2 4 -10 -2 -4 50 0 0 0c2-2c1,c3-4c1,c4+c11 0 0 00 -2 -4 50 0 0 0c2*(-1/2),c3+4c2,c4-5c21 0 0 00 1 0 00 0 0 0
