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# Evaluate.$4y^2$ for $y = 7$

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An algebraic expression is an expression containing a number and at least one variable. In order to evaluate an algebraic expression, substitute a number for each variable and then simplify. Follow the order of operations, including the exponents.

• Compute within grouping symbols.
• Compute powers.
• Multiply and/or divide in order from left to right.
• Add and/or subtract in order from left to right.

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