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(3a) + (4a) + 4
3a+4a 4
7a+4
(x+1)+(2×-×)+(×+2)
x+1+2x-x+x+2
3x +3
3(x+1)
x+(×+1)+(×+2)+(×+3)=
x+x+1+x+2+x+3
4x + 6
2(2x+3)
(4×y + ×y)-(2×y-3×y)
4×y + ×y -×y+3×y)
7xy
(m+n)+(2m+2n)-(m+n)
m+n +2m+2n -m-n
+3n +3m - m-n
2n + 2m