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The given question is on Adding rational expressions.

This question contains adding with the same polynomial x³.

The first step of the question is to calculate the LCM of the denominators 7 and 3, is 21.

Now 3 /7 and 4 /3 can be added with the LCM of the denominators as 21.

This makes the solution 3 x³/ 7 + 4 x³/ 3 = 9 x

Hence the solution is 37 x

The given question is on Adding rational expressions.

This question contains adding with the same polynomial x³.

The first step of the question is to calculate the LCM of the denominators 5 and 1, is 5.

Now 2/5 and 2 can be added with the LCM of the denominators as 5.

This makes the solution 2x³/5 + 2x³ = 2 x

Hence the solution is 12x