Evaluate
-\frac{62}{45}\approx -1.377777778
Factor
-\frac{62}{45} = -1\frac{17}{45} = -1.3777777777777778
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-\frac{4}{9}+\frac{2}{3}\left(-\frac{5}{7}\right)^{-1}
Subtract 1 from \frac{2}{7} to get -\frac{5}{7}.
-\frac{4}{9}+\frac{2}{3}\left(-\frac{7}{5}\right)
Calculate -\frac{5}{7} to the power of -1 and get -\frac{7}{5}.
-\frac{4}{9}-\frac{14}{15}
Multiply \frac{2}{3} and -\frac{7}{5} to get -\frac{14}{15}.
-\frac{62}{45}
Subtract \frac{14}{15} from -\frac{4}{9} to get -\frac{62}{45}.
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}