Evaluate
-\frac{1577}{77}\approx -20.480519481
Factor
-\frac{1577}{77} = -20\frac{37}{77} = -20.48051948051948
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-\frac{1643}{77}+\frac{66}{77}
Least common multiple of 77 and 7 is 77. Convert -\frac{1643}{77} and \frac{6}{7} to fractions with denominator 77.
\frac{-1643+66}{77}
Since -\frac{1643}{77} and \frac{66}{77} have the same denominator, add them by adding their numerators.
-\frac{1577}{77}
Add -1643 and 66 to get -1577.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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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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