Which is equivalent to RootIndex 5 StartRoot 1,215 EndRoot Superscript x?

243x
1,215 Superscript one-fifth x
1,215 Superscript StartFraction 1 Over 5 x EndFraction
243 Superscript StartFraction 1 Over x EndFraction

1 answer

fractions are typed this way:
two thirds ----- 2/3

powers:
cube root of 125 ----- (125)^(1/3)
x squared: ---- x^2
etc

Look how yours came out, so repost in standard form.
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