Ajutatima va rog frumos:
![Ajutatima Va Rog Frumos class=](https://ro-static.z-dn.net/files/d24/15129793f8883465b944dd898d36c49d.jpg)
Răspuns:
a) [(10+1+4):(-3)+5]:(-7)+1=(-5+5):(-7)+1=1
b) 1-2+3-4+....-2020=1+1+...+1=1*1010=1010