$$\left. \begin{array} { l } { - 6 + 8 = 7 ^ { 2 } } \\ { - 2 \frac { 1 } { 2 } + 3 \frac { 1 } { 2 } \leq \frac { 1 } { 2 } } \end{array} \right.$$
$\text{false}$
$$2=7^{2}\text{ and }-\frac{2\times 2+1}{2}+\frac{3\times 2+1}{2}\leq \frac{1}{2}$$
$$2=49\text{ and }-\frac{2\times 2+1}{2}+\frac{3\times 2+1}{2}\leq \frac{1}{2}$$
$$\text{false}\text{ and }-\frac{2\times 2+1}{2}+\frac{3\times 2+1}{2}\leq \frac{1}{2}$$
$$\text{false}\text{ and }-\frac{4+1}{2}+\frac{3\times 2+1}{2}\leq \frac{1}{2}$$
$$\text{false}\text{ and }-\frac{5}{2}+\frac{3\times 2+1}{2}\leq \frac{1}{2}$$
$$\text{false}\text{ and }-\frac{5}{2}+\frac{6+1}{2}\leq \frac{1}{2}$$
$$\text{false}\text{ and }-\frac{5}{2}+\frac{7}{2}\leq \frac{1}{2}$$
$$\text{false}\text{ and }\frac{-5+7}{2}\leq \frac{1}{2}$$
$$\text{false}\text{ and }\frac{2}{2}\leq \frac{1}{2}$$
$$\text{false}\text{ and }\text{false}$$
$$\text{false}$$
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