Evaluate
-\frac{10}{21}\approx -0.476190476
Factor
-\frac{10}{21} = -0.47619047619047616
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-9+\frac{168+11}{21}
Multiply 8 and 21 to get 168.
-9+\frac{179}{21}
Add 168 and 11 to get 179.
-\frac{189}{21}+\frac{179}{21}
Convert -9 to fraction -\frac{189}{21}.
\frac{-189+179}{21}
Since -\frac{189}{21} and \frac{179}{21} have the same denominator, add them by adding their numerators.
-\frac{10}{21}
Add -189 and 179 to get -10.
Examples
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y = 3x + 4
Arithmetic
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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