Evaluate
18
Factor
2\times 3^{2}
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21-\frac{6}{2!}
The factorial of 3 is 6.
21-\frac{6}{2}
The factorial of 2 is 2.
21-3
Divide 6 by 2 to get 3.
18
Subtract 3 from 21 to get 18.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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