expresiones algebraicas:

4m- (-2m+ n) + 3 n
3x+(2x-3y+4)-5y
5a-[-3b-(2a+4b-c)+4c]
2x+{-5x[-2y+(-x+y)]+6}
-{3m+2-[-m+n-p-(2m-3n+5p)-8]-2n}​