Exercise56

Simplify the following expressions if possible.

1) \(\displaystyle{ {r^{4}+r^{4}}=}\)

2) \(\displaystyle{ (r^4)(r^4)=}\)

3) \(\displaystyle{ {r^{4}+r^{3}}=}\)

4) \(\displaystyle{ (r^4)(r^3)=}\)

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