Evaluate
\frac{21}{5}=4.2
Factor
\frac{3 \cdot 7}{5} = 4\frac{1}{5} = 4.2
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\frac{1}{5}+\frac{20}{5}
Convert 4 to fraction \frac{20}{5}.
\frac{1+20}{5}
Since \frac{1}{5} and \frac{20}{5} have the same denominator, add them by adding their numerators.
\frac{21}{5}
Add 1 and 20 to get 21.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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.
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\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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