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Use this calculator to add or subtract two or more time values in the form of an expression. 4d singapore slot login An acceptable input has d, h, m, and s following each value, where d means days, h means hours, m means minutes, and s means seconds The only acceptable operators are + and - "1d 2h 3m 4s + 4h 5s - 2030s" is an example of a valid expression