👤

5. Calculaţi: (-5) {396-720: [-7+(6590 +51-210): (-2²-5²)]}; (1-21)² +17|-|(-5)| + |(−1)2²021|-|-11| +4·|-| ; c) [(-520 : 518): (-1) 2021 -(-18):3²]:(-3)³; d) [(-3)-(-3)²-(-3) -(-3)*-(-3)' +275]-(-1)+2. 1+2+3+...+2020​