limit as n approaching+infinity+of \sum_{i=1}^n((2i)/n)(2/n)

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\square^{2}

x^{\square}

\sqrt{\square}

\nthroot[\msquare]{\square}

\frac{\msquare}{\msquare}

\log_{\msquare}

\pi

\theta

\infty

\int

\frac{d}{dx}

\ge	\le	\cdot	\div	x^{\circ}	(\square)	\|\square\|	(f\:\circ\:g)	f(x)	\ln	e^{\square}
\left(\square\right)^{'}	\frac{\partial}{\partial x}	\int_{\msquare}^{\msquare}	\lim	\sum	\sin	\cos	\tan	\cot	\csc	\sec

正确答案 :)

让我们再次尝试 :(

Try to further simplify

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