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Input:
expand((a+ b)^2)
Write:
`expand((a+ b)^2)`
Compute:
$$expand :\\ \ {(a+b)}^{2}$$
Output:
$$expand :\\ \ {(a+b)}^{2}== {a}^{2}+2\ a\ b+{b}^{2}$$
Result: $${a}^{2}+2\ a\ b+{b}^{2}$$
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