The ornamental design of a chair with curvedlegs and back support, as shown and described.
FIG. 1 is a first perspective view of a chair with curved legs and back support, showing my design, the broken lines are for environmental purposes only and form no part of the claimed design;
FIG. 2 is a front view of the chair illustrated in FIG. 1;
FIG. 3 is a side view of the chair illustrated in FIG. 1, the opposite side of the chair being identical;
FIG. 4 is a top view of the chair illustrated in FIG. 1;
FIG. 5 is a bottom view of the chair illustrated in FIG. 1;
FIG. 6 is a rear view of the chair illustrated in FIG. 1; and,
FIG. 7 is a second perspective view of the chair illustrated in FIG. 1.