Evaluate
\frac{71}{98}\approx 0.724489796
Factor
\frac{71}{2 \cdot 7 ^ {2}} = 0.7244897959183674
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\frac{11\times 1}{14\times 7}+\frac{5\sqrt{3}}{14}\times \frac{4\sqrt{3}}{7}
Multiply \frac{11}{14} times \frac{1}{7} by multiplying numerator times numerator and denominator times denominator.
\frac{11}{98}+\frac{5\sqrt{3}}{14}\times \frac{4\sqrt{3}}{7}
Do the multiplications in the fraction \frac{11\times 1}{14\times 7}.
\frac{11}{98}+\frac{5\sqrt{3}\times 4\sqrt{3}}{14\times 7}
Multiply \frac{5\sqrt{3}}{14} times \frac{4\sqrt{3}}{7} by multiplying numerator times numerator and denominator times denominator.
\frac{11}{98}+\frac{2\times 5\sqrt{3}\sqrt{3}}{7\times 7}
Cancel out 2 in both numerator and denominator.
\frac{11}{98}+\frac{2\times 2\times 5\sqrt{3}\sqrt{3}}{98}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 98 and 7\times 7 is 98. Multiply \frac{2\times 5\sqrt{3}\sqrt{3}}{7\times 7} times \frac{2}{2}.
\frac{11+2\times 2\times 5\sqrt{3}\sqrt{3}}{98}
Since \frac{11}{98} and \frac{2\times 2\times 5\sqrt{3}\sqrt{3}}{98} have the same denominator, add them by adding their numerators.
\frac{11+60}{98}
Do the multiplications in 11+2\times 2\times 5\sqrt{3}\sqrt{3}.
\frac{71}{98}
Do the calculations in 11+60.
Examples
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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}