equation 521 1201 877 1283
equation 526 444 877 483
equation 554 167 832 235
equation 562 736 823 761
equation 141 828 460 854
text 510 498 876 717
text 510 251 876 429
text 510 779 876 1185
text 510 108 876 151
text 118 874 484 1276
text 118 108 485 811