“∑n2 = n(n+1)(2n+1)/6” has been added to your cart. Continue shopping Product Price Quantity Subtotal Double Periscope ₹4,600.00 Double Periscope quantity ₹4,600.00 ∑n2 = n(n+1)(2n+1)/6 ₹440.00 ∑n2 = n(n+1)(2n+1)/6 quantity ₹440.00 Coupon: Cart Totals Subtotal ₹5,040.00 9% CGST ₹453.60 9% SGST ₹453.60 Total ₹5,947.00 Continue Shopping Checkout