Cum rezolvam
[500+(1500:5)+2(50x 2)]:(2x5)=


{1+4-2(20x6-50:5)[1-(4x7-4-6x4)]}=


1500-[2x30(1+6)+2:2]-{1+[4x5(1+2)]}=


20:5{1+5[3x3(1500-500):1000]+3}=


{500-4x2-1x2[1+90:10(49:7+81:9)-1]-2}=


{10-10:5[4x4+10(2x3+8)]-1}=


(4x9)-[60:10-6(4500-34x100)]=


{6 x600[500:5 –(51-1):5]-(8x9x4)}=