please help with pattern

please I need help with this pattern. any help would be appreciated. piece is in medium size

Keeping patt correct, inc 1 st at each end of next and foll 7[12: 10: 10: 9l alt rcws, then on foll 46[40: 44: 44: 48] rows, taking inc sts into patt and ending with WiS facing for next row.

201[209: 223: 233: 249] sts.

Place markers at both ends of last row (to denote base of cuff open nes

Cont straight until work meas 15 [15.5: 16: 16: 16.5] cm from ma civening with RS facing for next row.

thanks bunches

Welcome to the forum!
I’m assuming the 2nd size is medium so if you call the next row, row 1 you would increase at each end on rows 1,3,5,7,9,11,13,15,17,19,21 and 23. That’s the next 12 alternate rows. Then increase every row for the next 40 rows which start as 24,25,26,27,28 and so on ending having completed a RS row. The WS is facing for the next row.
What is the name of your pattern and designer?