Algebraic Expressions

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Across
  1. 3. a combination of numbers and operations
  2. 4. a number that is attached to a variable
  3. 5. numbers that are less than 0
  4. 6. terms that have the same variables to the same power
Down
  1. 1. a branch of mathematics that include symbols
  2. 2. numbers that are greater than 0
  3. 4. a number without a variable
  4. 7. a part of an expression that is separated by addition or subtraction