its like subtracting. so 26-5=21, -26+5=-21 it seems like your subtracting
57
-3x + 10x - 5 + 26 = 7x + 21
5 + 26 + 5 + 6 + 8 + 68 + 53 + 556 + 565252 + 52 = 566031
-26
26 times 12 +5= 317
26-4*5+226-20+26+28
15x26=390
It is: 5+(3*7) = 26
26
13+13=26 or2.7+20.3+5=26
5-1= 4times6 (plus 2) = 26
It is: 5+(3*7) = 26