text 151 1949 805 2021
text 184 342 806 759
equation 262 1792 694 1919
text 852 216 1508 1850
text 151 850 806 1766
equation 921 1893 1436 2019
equation 364 787 803 823
equation 331 272 803 316
text 212 216 624 253
header 572 154 1090 180