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Arithmetic
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\frac { \pi } { 12 } = \frac { \pi } { 3 } - \frac { \pi } { 4 }
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\pi =4\pi -3\pi
Multiply both sides of the equation by 12, the least common multiple of 12,3,4.
\pi =\pi
Combine 4\pi and -3\pi to get \pi .
\text{true}
Compare \pi and \pi .
Examples
Quadratic equation
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Simultaneous equation
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Integration
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Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}