text 851 1726 1506 1989
text 851 193 1506 667
equation 913 668 1433 745
equation 859 1216 1504 1686
text 851 769 1506 994
text 851 1104 1506 1203
equation 866 1000 1486 1104
text 151 193 808 1994
header 570 120 1090 153