$$\sum_{n=1}^N\prod_{k=1}^K\sum_{m=1}^M\left[\frac{bk^3n^5-cm^2}{n^2+ak^4}\right]$$
I must make it work in a C programme , for my C class , and we will give number for the $a, b ,c , N , M, K$ in the programme.
But how will I write it? First the addition then the multiplication , and then the outer addition ?
I dont want the answer to how to write the programme , but how to analyze this ?