Evaluate
15
Factor
3\times 5
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\frac{81+1}{9}+\frac{5\times 9+8}{9}
Multiply 9 and 9 to get 81.
\frac{82}{9}+\frac{5\times 9+8}{9}
Add 81 and 1 to get 82.
\frac{82}{9}+\frac{45+8}{9}
Multiply 5 and 9 to get 45.
\frac{82}{9}+\frac{53}{9}
Add 45 and 8 to get 53.
\frac{82+53}{9}
Since \frac{82}{9} and \frac{53}{9} have the same denominator, add them by adding their numerators.
\frac{135}{9}
Add 82 and 53 to get 135.
15
Divide 135 by 9 to get 15.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}