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In my mind, using linked list is somehow abstract. Despite reading posts with similar topic, I still cannot understand how to apply it in to real problem. My teacher gives my this exercise. In spite of not being mandatory, I want do is to understand the problem:

Addition/subtraction /multiplication.. . of two polynomials.

P1(x) = 2x2+3x+7

P2 (x)= 3x3+5x+2

P1(x)+ P2(x)= 3x3+2x2+8x+9

Can anyone give me some cue?