19)
[tex]\frac{8^{20} }{8^{18} } + \frac{5^{14} }{5^{13} } +\frac{2^{6} }{4}[/tex]
[tex]8^{2} +5^{1} + \frac{2^{6} }{2^{2} }[/tex]
[tex]64+5+ 2^{4} =85[/tex]
20)
[tex]\frac{3^{10} . 5^{7} . 2^{3} .2^{3}.2^{3}.1^{20} .5^{1} .5^{1} }{2^{9}.5^{9} .3^{8} }+1[/tex]
[tex]\frac{3^{10} . 5^{9} . 2^{9} .1^{20} }{2^{9}.5^{9} .3^{8} } +1[/tex]
[tex]3^{2} .1.1+1=10[/tex]
:)
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19)
[tex]\frac{8^{20} }{8^{18} } + \frac{5^{14} }{5^{13} } +\frac{2^{6} }{4}[/tex]
[tex]8^{2} +5^{1} + \frac{2^{6} }{2^{2} }[/tex]
[tex]64+5+ 2^{4} =85[/tex]
20)
[tex]\frac{3^{10} . 5^{7} . 2^{3} .2^{3}.2^{3}.1^{20} .5^{1} .5^{1} }{2^{9}.5^{9} .3^{8} }+1[/tex]
[tex]\frac{3^{10} . 5^{9} . 2^{9} .1^{20} }{2^{9}.5^{9} .3^{8} } +1[/tex]
[tex]3^{2} .1.1+1=10[/tex]
:)