REDUCIR TERMINOS SEMEJANTES :
12a - 5a - 3a + 8a +9a
-3xy2 + 7xy2 - 5xy2 + 9xy2
-6m3n2 - 5m3n2 + 8 m3n2 + 16m3n2
-9a3b2c - 123b2c - 83b2c +503b2c + a3b2c
6xy2z3w^4 - 9xy2z3w^4 + 13xy2z3w^4 -25xy2z3w^4
URGENTE POR FAVOR!
12a-5a-3a+8a+9a=21a
-3xy2+7xy2-5xy2+9xy2=8xy2
-6m3n2-5m3n2+8m3n2+16m3n2=13m3n2
-9a3b2c-123b2c-83b2c+503b2c+a3b2c=-8a3b2c+297b2c
6xy2