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Input:
sum(x^k,k,0,5)
Write:
`sum(x^k,k,0,5)`
Compute:
$$\sum _{k=0} ^ {5} {x}^{k}$$
Output:
$$\sum _{k=0} ^ {5} {x}^{k}== \frac {(-1+{x}^{6})}{-1+x}$$ Result: $$\frac {(-1+{x}^{6})}{-1+x}$$
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