Help with a pattern - please
I am a novice knitter making a baby's cardigan but do not understand a row of instructions on the sleeves as follows, please help. 16th row: K3 [3:2:3:2:3], m1, (K7 [7:5:5:4:4],m1) 3
[3:5:5:7:7] times, K to end. I understand the nos. in square brackets applies to size working to and m1 is increase stich but can't get the rest clear in my head.