using horizontal method
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Answer:
a) 5xy+2x +(-2xy +3y)+(8xy - 3x+4y)
= 5xy +2x - 2xy +3y +8xy - 3x +4y
= 5xy - 2xy +8xy +2x - 3x + 3y + 4y
=11xy - x +7y ans.
b) m+1 +m^2 +m
= m^2 + m +m +1
=m^2+2m +1 ans.
c) 4t^4 +2t +11 +(-3t^2+t) +(t^4 - 2)
= 4t^4 +2t +11 - 3t^2 +t +t^4 - 2
=4t^4 + t^4 - 3t^2 +2t +t +11 - 2
=5t^4 - 3t^2 +3t +9 ans.
d) 2a +3b - 4c +( 8c-1)+(5b+4)
= 2a+ 3b - 4c +8c - 1 +5b +4
= 2a +3b +5b - 4c +8c - 1 +4
=2a + 8b +4c +3 ans.
Hope it's helpful for you
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