text 851 1864 1506 1994
text 151 191 806 1978
text 851 357 1506 919
text 851 1035 1508 1455
text 851 1669 1506 1768
text 852 1541 1305 1572
equation 941 942 1416 1013
equation 1007 1793 1503 1839
equation 890 241 1503 331
equation 919 1598 1436 1644
equation 854 1479 1504 1517
header 576 130 1090 156
text 844 196 1106 220