text 151 727 806 864
equation 225 991 803 1067
equation 316 625 638 713
equation 860 1835 1496 1925
text 853 1954 1491 2001
text 151 191 806 604
equation 890 1662 1466 1752
equation 364 878 803 926
text 853 1775 1257 1809
text 152 939 587 970
text 151 1085 806 1994
text 851 561 1509 1638
equation 940 332 1400 522
text 856 184 1510 313
header 576 124 1088 157