Question 262219
{{{2^3+2^-1}}}
step 1 - rewrite the negative power as fraction to get
{{{2^3 + 1/2}}}
this is
{{{8 + 1/2}}}
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{{{3^3+3^3}}}
rewrite the powers as integers as
{{{27 + 27}}}
this is
{{{54}}}