List munipulation in python : How could I get to result and abResult? Please guide me through, I really appreciate it!

x=[1,2]      

y=[3,4,5]

result= [3,9]   <===  the sum of result determine by x

=============OR==========

a=[1,3,2]

b= [4,2,3,4,5,10]

abResult= [4,9,15]