equation 631 673 878 732
equation 600 470 878 493
equation 623 1047 878 1073
equation 615 826 878 852
text 117 108 488 1276
text 510 108 880 446
text 509 869 880 1021
text 509 1098 880 1276
text 509 518 880 651
text 510 755 877 797