The ornamental design for a paperproduct with pattern, as shown and described.
FIG. 1 is a top plan view of a first embodiment of a paper product with pattern; and,
FIG. 2 is a top plan view of a second embodiment of a paper product with pattern.
The inner dash dot dot dash broken lines depict the boundaries of the claim and form no part thereof. All other broken lines depict portions of the paper product with pattern that form no part of the claimed design.