This is my playground yay.
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An occasionally appearing surplus decimal place 5 gives a deceptive impression of higher accuracy.
5
2^3 5 * 7^-5*11**9 19^−4
2^3 * 5 * 7^-5*11**9 * 19^−4
{{#replace:2-1+3-5|-|−}} 2−1+3−5
{{#replace:2-1+3-5|-|−}}