8

$-8$

$\frac{1}{8}$

$-\frac{1}{8}$

$7.76\times {10}^5$

$7.76\times {10}^6$

$77.6\times {10}^6$

$7.76\times {10}^7$

$4a^5$

$4a^6$

$3a^5$

$3a^6$

$x<2$

$x⩽2$

$x>2$

$x⩾2$