5c + 3a +7a -2b - 10a
2 a + 3a + 5b - 4a + 3b
3 (x + y) + 5y - x
5a + 3b + 2b +7a -4c
5 (a + c) + 5b
4a + 5b -2a + 6b
3 ( a + b)
UNE
2x + 3y -x
a + 3b - 4c +6c -5b
LAS TARJETAS
2a +11b
2x + 8y
-2b + 5c
5a + 5b + 6c
a -2b + 2c
x + 3y
a + 8b
3a + 3b
12 a + 5b -4c