1. The problem asks to select all the squares from the given expressions and order them from least to greatest. 2. First, identify which expressions are perfect squares or can be simplified to squares. 3. Evaluate each expression: - $\sqrt{7} \approx 2.645$ (not a perfect square, it's a square root) - $6! = 720$ (factorial of 6) - $e^2 \approx 7.389$ (e squared, this is a perfect square of $e$) - $\sum_{i=2}^6 i = 2+3+4+5+6 = 20$ - $\frac{12}{13} \approx 0.923$ (fraction) - $\frac{3\pi}{4} \approx 2.356$ (not a perfect square) - $\log_3(10) \approx 2.095$ (logarithm) - $\infty$ (infinity, not a number) - $\int_3^6 x \, dx = \left[ \frac{x^2}{2} \right]_3^6 = \frac{6^2}{2} - \frac{3^2}{2} = \frac{36}{2} - \frac{9}{2} = \frac{27}{2} = 13.5$ 4. Now, check which of these are perfect squares: - $e^2$ is a perfect square (square of $e$) - $6! = 720$ is not a perfect square - $20$, $13.5$, $2.645$, $2.356$, $2.095$, $0.923$ are not perfect squares 5. So the only perfect square is $e^2$. 6. Since the problem asks to select all squares in order from least to greatest, and only $e^2$ qualifies, the answer is: $$e^2$$