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Work 4 more rows and then increase at each end of the next row, row 5 and the on rows 14, 23,32,41,50 and so on until you've done the number of increases specified.
If you want to keep the increases on the right side rows, you can move the increases on wrong side rows to the next row or the previous row without affecting the sleeve. If you knit both sleeves at the same time with separate balls of yarn, it's easier to keep the increases on the same row. If not, keep good notes.