text 151 1826 808 1989
text 852 1551 1508 1894
text 851 189 1506 1434
equation 880 1455 1499 1534
text 151 883 807 1633
equation 152 1664 779 1799
equation 152 729 803 859
text 853 1963 1476 1994
equation 974 1909 1384 1945
text 151 190 807 661
header 438 130 1226 154