Hi, I have \placeformula[-] \startformula F(n) = \startdisplaycases \NC F(0) + 2 \ln n!! - \frac{n}{2} \ln 2 \MC \text{si } n \text{ parell} \NR \NC F(1) + 2 \ln n!! - \frac{n+1}{2} \ln 2 \MC \text{si } n \text{ senar} \NR \stopdisplaycases \stopformula and I want to put \placeformula[-] \{ \startformula F(n) = \startdisplaycases \NC F(0) + 2 \ln n!! - \frac{n}{2} \ln 2 \MC \text{si } n \text{ parell} \NR \NC F(1) + 2 \ln n!! - \frac{n+1}{2} \ln 2 \MC \text{si } n \text{ senar} \NR \stopdisplaycases \stopformula But I received error. I have MKII. How can I put braces and do that enumeration formula is at middle possition (not in first or last line, just in the middle). I use Aditya manual but I did not see it. Xan.