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  "body": "\n## Statement\n\nIn mathematics, a **law** is a formula that is always true within a given context. Laws describe a relationship, between two or more expressions or terms (which may contain variables), usually using equality or inequality, or between formulas themselves, for instance, in mathematical logic. For example, the formula $a^2 \\geq 0$ is true for all [[real numbers|08J2M1JYAG]] *$a$*, and is therefore a law. Laws over an equality are called identities. For example, $(a+b)^2 = a^2 + 2ab + b^2$ and $\\cos^2\\theta + \\sin^2\\theta =1$ are identities. Mathematical laws are distinguished from scientific laws which are based on observations, and try to describe or predict a range of natural phenomena.\n",
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