Răspuns:
a)2-(1020:85+205):[33×18-(50×10+23×4)]+1343:17-262=289
2-217:(33×18-592)+1343:17-262=289
2-217:2+1343:17-262=289
2-108+262-79=289
106+183=289
b)(3-1512+21.512):15+(32+32):(33+3):3+12005-2005=11392
20.003:15+64:36:3+12005-2005=11392
1333+59+10000=11392
1392+10000=11392