2.7.1버전

특징
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한줄 입력 명령어 추가

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\[\begin{align} \sum_{i=1}^{n} \{ i^3 - (i+1)^3 \} &= (1 - \cancel{2^3}) + ({2^3} - {3^3}) + ... + ({n^3} - (n+1)^3) \\ &= 1 - (n+1)^3 \\ &= 1 -n^3 -3n^2 -3n {-1} \end{align}\]
∖[∖begin{align} ∖sum_{i=1}^{n} ∖{ i^3 - (i+1)^3 ∖} &= (1 - ∖cancel{2^3}) + ({2^3} - {3^3}) + ... + ({n^3} - (n+1)^3) ∖∖ &= 1 - (n+1)^3 ∖∖ &= 1 -n^3 -3n^2 -3n {-1} ∖end{align} ∖]