Evaluate
84
Factor
2^{2}\times 3\times 7
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\frac{362880}{3!\left(9-3\right)!}
The factorial of 9 is 362880.
\frac{362880}{6\left(9-3\right)!}
The factorial of 3 is 6.
\frac{362880}{6\times 6!}
Subtract 3 from 9 to get 6.
\frac{362880}{6\times 720}
The factorial of 6 is 720.
\frac{362880}{4320}
Multiply 6 and 720 to get 4320.
84
Divide 362880 by 4320 to get 84.
Examples
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Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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