Evaluate
\frac{21}{4}=5.25
Factor
\frac{3 \cdot 7}{2 ^ {2}} = 5\frac{1}{4} = 5.25
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\frac{2}{\frac{2\times 3}{3\times 10}+\frac{7}{25}\times 5}+4
Multiply \frac{2}{3} times \frac{3}{10} by multiplying numerator times numerator and denominator times denominator.
\frac{2}{\frac{2}{10}+\frac{7}{25}\times 5}+4
Cancel out 3 in both numerator and denominator.
\frac{2}{\frac{1}{5}+\frac{7}{25}\times 5}+4
Reduce the fraction \frac{2}{10} to lowest terms by extracting and canceling out 2.
\frac{2}{\frac{1}{5}+\frac{7\times 5}{25}}+4
Express \frac{7}{25}\times 5 as a single fraction.
\frac{2}{\frac{1}{5}+\frac{35}{25}}+4
Multiply 7 and 5 to get 35.
\frac{2}{\frac{1}{5}+\frac{7}{5}}+4
Reduce the fraction \frac{35}{25} to lowest terms by extracting and canceling out 5.
\frac{2}{\frac{1+7}{5}}+4
Since \frac{1}{5} and \frac{7}{5} have the same denominator, add them by adding their numerators.
\frac{2}{\frac{8}{5}}+4
Add 1 and 7 to get 8.
2\times \frac{5}{8}+4
Divide 2 by \frac{8}{5} by multiplying 2 by the reciprocal of \frac{8}{5}.
\frac{2\times 5}{8}+4
Express 2\times \frac{5}{8} as a single fraction.
\frac{10}{8}+4
Multiply 2 and 5 to get 10.
\frac{5}{4}+4
Reduce the fraction \frac{10}{8} to lowest terms by extracting and canceling out 2.
\frac{5}{4}+\frac{16}{4}
Convert 4 to fraction \frac{16}{4}.
\frac{5+16}{4}
Since \frac{5}{4} and \frac{16}{4} have the same denominator, add them by adding their numerators.
\frac{21}{4}
Add 5 and 16 to get 21.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}