[tex]a)~2 \cdot 117-(10+12+14)=234-36=198. \\ \\ b)~11^2:[(3 \cdot 2-1)+(3+1)]= \\ \\~~~=121:(5+4)= \\ \\ ~~~=121:9~ \longrightarrow~catul~este~13. \\ \\ c)~11 \cdot (2 \cdot 3^3-21)= \\ \\ ~~~=11 \cdot(2 \cdot 27-21)= \\ \\ ~~~=11 \cdot 33= \\ \\ ~~~=363.[/tex]
[tex]d)~ \frac{2k+(2k+2)}{2}-(2k+1)= \\ \\ ~~~= \frac{4k+2}{2}-(2k+1)= \\ \\ ~~~= \frac{2(2k+1)}{2}-(2k+1) = \\ \\ ~~~=2k+1-(2k+1)= \\ \\ ~~~=0.[/tex]