MATHEMATICS

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Across
  1. 2. single term
  2. 4. made up of 3 line segments
  3. 5. an expression with same variables
  4. 7. m^2+1,m^2-1
Down
  1. 1. the opperation of +
  2. 3. two or more variables in a expression
  3. 6. no.of edges of cube