It seems like you are asking for a translation of the mathematical expressions provided. Here is a breakdown of each expression:
-
90f32g81: This can be read as "90 times f raised to the 32nd power times g raised to the 81st power."
-
90f12g18: This translates to "90 times f raised to the 12th power times g raised to the 18th power."
-
90fg: This is read as "90 times f times g."
-
90f4g0: This can be understood as "90 times f raised to the 4th power times g raised to the 0th power." Note that any number (except zero) raised to the power of zero is equal to 1, so this effectively simplifies to "90 times f to the 4th power."
If you need further assistance or a different interpretation, please let me know!