Evaluate
\frac{21}{8}=2.625
Factor
\frac{3 \cdot 7}{2 ^ {3}} = 2\frac{5}{8} = 2.625
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\frac{\frac{12+2}{4}}{4-\frac{2\times 3+2}{3}}
Multiply 3 and 4 to get 12.
\frac{\frac{14}{4}}{4-\frac{2\times 3+2}{3}}
Add 12 and 2 to get 14.
\frac{\frac{7}{2}}{4-\frac{2\times 3+2}{3}}
Reduce the fraction \frac{14}{4} to lowest terms by extracting and canceling out 2.
\frac{\frac{7}{2}}{4-\frac{6+2}{3}}
Multiply 2 and 3 to get 6.
\frac{\frac{7}{2}}{4-\frac{8}{3}}
Add 6 and 2 to get 8.
\frac{\frac{7}{2}}{\frac{12}{3}-\frac{8}{3}}
Convert 4 to fraction \frac{12}{3}.
\frac{\frac{7}{2}}{\frac{12-8}{3}}
Since \frac{12}{3} and \frac{8}{3} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{7}{2}}{\frac{4}{3}}
Subtract 8 from 12 to get 4.
\frac{7}{2}\times \frac{3}{4}
Divide \frac{7}{2} by \frac{4}{3} by multiplying \frac{7}{2} by the reciprocal of \frac{4}{3}.
\frac{7\times 3}{2\times 4}
Multiply \frac{7}{2} times \frac{3}{4} by multiplying numerator times numerator and denominator times denominator.
\frac{21}{8}
Do the multiplications in the fraction \frac{7\times 3}{2\times 4}.
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}