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2. Shutterfly coupon for 29% off - AOL

   www.aol.com/2010/09/20/shutterfly-coupon-for-29-off

   This Shutterfly photo discount is misleading because it can be stacked on top of already-discounted photo books, upping the discount to as much as 50% off. Use Shutterfly coupon code BOOK29 to get ...

3. American Express - Wikipedia

   en.wikipedia.org/wiki/American_Express

   History Early history Share of the American Express Company, 1865. In 1850, American Express was started as a freight forwarding company in Buffalo, New York. It was founded as a joint-stock corporation by the merger of the cash-in-transit companies owned by Henry Wells (Wells & Company), William G. Fargo (Livingston, Fargo & Company), and John Warren Butterfield (Wells, Butterfield & Company ...

4. 50 (number) - Wikipedia

   en.wikipedia.org/wiki/50_(number)

   In mathematics[edit] 50 as the sum of two non-zero squares. Fifty is the smallest number that is the sum of two non-zero square numbers in two distinct ways: 50 = 1 2 + 7 2 = 5 2 + 5 2 (see image). [1] It is also the sum of three squares, 50 = 3 2 + 4 2 + 5 2, and the sum of four squares, 50 = 6 2 + 3 2 + 2 2 + 1 2. It is a Harshad number. [2]

5. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   Order of operations. In mathematics and computer programming, the order of operations is a collection of rules that reflect conventions about which operations to perform first in order to evaluate a given mathematical expression . These rules are formalized with a ranking of the operations. The rank of an operation is called its precedence, and ...

6. Sodium hypochlorite - Wikipedia

   en.wikipedia.org/wiki/Sodium_hypochlorite

   CN− + −OCl → OCN− + Cl−. Sodium hypochlorite is commonly used as a biocide in industrial applications to control slime and bacteria formation in water systems used at power plants, pulp and paper mills, etc., in solutions typically of 10–15% by weight.

7. Slavery in the 21st century - Wikipedia

   en.wikipedia.org/wiki/Slavery_in_the_21st_century

   Estimates of the number of enslaved people today range from around 38 million to 49.6 million, depending on the method used to form the estimate and the definition of slavery being used. The estimated number of enslaved people is debated, as there is no universally agreed definition of modern slavery; [6] those in slavery are often difficult to ...