She did a lot but I think what you're looking for is her invention of the "variable" in algebra. That's right, all those x's, y's and z's that you hate are her invention.
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In school, Mary thinks math is the worst subject because of fractions.
she is famous cause she knows alot f math
Wagner does finantial maths and Mary does commercial maths their brilliance combined makes wagbo source: wagbos autobiography
A 19TH century pioneer woman named Mary Somerville invented Variables. She was a Scientist and a mathematician.
Mary Somerville was a Scottish mathematician and astronomer. She contributed many things to the mathematic world, but her invention of the commonly used variables for algebraic math is the most significant.