Preeti is arranging pencils in a box. If in one layer,she puts in three pencils, then find the rule for the number of pencils in the box if the number of layersin the box is s.

Preeti is arranging pencils in a box. If in one layer,she puts in thre

1.	Preeti is arranging pencils in a box. If in one layer,she puts in three pencils, then find the rule for the number of pencils in the box if the number of layersin the box is s.
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