text 851 973 1506 1207
text 151 473 808 1905
text 851 741 1508 871
equation 863 1231 1503 1303
equation 961 623 1503 701
text 851 1326 1507 1940
equation 153 332 811 428
equation 257 1918 699 2000
text 852 293 1505 601
equation 983 894 1375 949
equation 852 1946 1505 2003
text 854 194 930 218
text 156 184 814 301
header 428 130 1242 157
equation 850 224 1508 272