The ornamental design for a cuttinginsert, as shown and described.
FIG. 1 is a perspective view of a cutting insert showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a cross-sectional view taken along line 8-8 of FIG. 6.
The broken lines depict portions of the cutting insert that form no part of the claimed design. The dash-dot-dash broken lines define the bounds of the claimed design and form no part thereof.