July 2023 1 4 Report
suprimir los signos de agrupación:
1): 2a + [4a - (3a + b) ]
2): 3× - [5× + 3y-(2×-y ) ]
3): 2m +[ (5m -6n) - ( 2m +n)]

4): 4x2 +[-(3x2 -5xy) + (-3y2 +5xy) - ( -3x2 +y2)]

5: 6a +{ (-2a +b) - ( -a +b -c) +3a}

6: 4m -[ 2m +(4n -3)] +[ -4n -( 2m +1)]

7: 2x +[ -5x -2y + ( -x + y)]

8: 5x2 -{ -7xy +[ -y2 +( -x2 +3xy -3y2 ] }

9) –4a +b + {3a +b - [-2a +b -( a -b) ] } +8a

10) -x +y - { x + y + [ -x –y - (x +y)]}​

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