4 </span>'}{\html '<span class="right_angle">2 </span>' \html '<span class="right_angle">2 </span>'} (1/6)^2(5/6)^2 =\frac{4\cdot3\cdot2\cdot1}{2\cdot2}\times{1}/{6^{2}}\times{5^{2}}/{6^{2}} ={6\times25}/{6^{2}\times6^{3}}={25}/{6\times6^{2}}=\frac{25}{216}" >