Evaluate
\frac{5}{13}\approx 0.384615385
Factor
\frac{5}{13} = 0.38461538461538464
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\frac{-16\times 4}{65\times 5}+\frac{63}{65}\times \frac{3}{5}
Multiply -\frac{16}{65} times \frac{4}{5} by multiplying numerator times numerator and denominator times denominator.
\frac{-64}{325}+\frac{63}{65}\times \frac{3}{5}
Do the multiplications in the fraction \frac{-16\times 4}{65\times 5}.
-\frac{64}{325}+\frac{63}{65}\times \frac{3}{5}
Fraction \frac{-64}{325} can be rewritten as -\frac{64}{325} by extracting the negative sign.
-\frac{64}{325}+\frac{63\times 3}{65\times 5}
Multiply \frac{63}{65} times \frac{3}{5} by multiplying numerator times numerator and denominator times denominator.
-\frac{64}{325}+\frac{189}{325}
Do the multiplications in the fraction \frac{63\times 3}{65\times 5}.
\frac{-64+189}{325}
Since -\frac{64}{325} and \frac{189}{325} have the same denominator, add them by adding their numerators.
\frac{125}{325}
Add -64 and 189 to get 125.
\frac{5}{13}
Reduce the fraction \frac{125}{325} to lowest terms by extracting and canceling out 25.
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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.
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}