text 151 306 808 1994
equation 871 449 1506 561
text 851 604 1508 1742
equation 852 1781 1516 1934
text 851 1930 1506 1995
equation 370 245 805 279
text 865 190 1506 410
text 152 190 797 224
header 498 126 1161 157