Evaluate
-\frac{28}{9}\approx -3.111111111
Factor
-\frac{28}{9} = -3\frac{1}{9} = -3.111111111111111
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-\frac{108+1}{9}+9
Multiply 12 and 9 to get 108.
-\frac{109}{9}+9
Add 108 and 1 to get 109.
-\frac{109}{9}+\frac{81}{9}
Convert 9 to fraction \frac{81}{9}.
\frac{-109+81}{9}
Since -\frac{109}{9} and \frac{81}{9} have the same denominator, add them by adding their numerators.
-\frac{28}{9}
Add -109 and 81 to get -28.
Examples
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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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
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