How do I enter mixed fractions like 1⅔ ?

How do I insert something into the middle of an expression?

I have a price inclusive of tax, how do I calculate the price without tax?

How do I enter angles with minutes, and seconds like 30° 40ʹ 50ʺ?

How do I access the other logarithmic functions like log₂ and log₁₀?

How do I calculate the logarithm for any base?

Where are all the extra functions?

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