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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 which are 5 and 6, is 30.

Now 2/5 and 5/6 can be added with the LCM of the denominators as 30.

This makes the solution 2 x³/5 + 5 x³/6 = 12x

The given question is on Adding rational expressions.

The first step of the question is to calculate the LCM of 4 and 7 which is 28.

Now 3/4 and 2/7 can be added with the LCM of the denominators as 28.

3 x/ 4 + 2 x/ 7= [(3*7) x / (4*7)] + [(2*4) x / (7*4)] = 21x/28 + 8x/28