Independent, paired and one-sample t-tests from real summary statistics: the t statistic, degrees of freedom, p-value and a verdict at alpha 0.05.
Push uncertainties through any formula step by step, in quadrature or worst case, with partial derivatives and a relative or absolute output error.
Length, area and volume change with temperature for any material, plus the fixed-length gap a joint needs to stay sealed from cold to hot.
Add or subtract business days with a real holiday calendar, count working days between two dates, and see every excluded weekend or holiday listed.
An IPv4 CIDR into its network address, netmask, broadcast, total and usable host counts and the first and last usable host, with the address as a 32-bit integer and back.
Compare two semantic versions the way semver actually orders them, sort a list, and see what a caret or tilde range resolves to.
Compare products by price and quantity normalized to one unit, ranked by what you actually pay per gram, per ml or per sheet.
Compare two texts line by line and word by word, with a unified diff and add/remove counts.
