Evaluate
-\frac{31}{5}=-6.2
Factor
-\frac{31}{5} = -6\frac{1}{5} = -6.2
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2\left(\frac{2}{5}+\frac{10}{5}\right)-2\left(\frac{1}{2}+5\right)
Convert 2 to fraction \frac{10}{5}.
2\times \frac{2+10}{5}-2\left(\frac{1}{2}+5\right)
Since \frac{2}{5} and \frac{10}{5} have the same denominator, add them by adding their numerators.
2\times \frac{12}{5}-2\left(\frac{1}{2}+5\right)
Add 2 and 10 to get 12.
\frac{2\times 12}{5}-2\left(\frac{1}{2}+5\right)
Express 2\times \frac{12}{5} as a single fraction.
\frac{24}{5}-2\left(\frac{1}{2}+5\right)
Multiply 2 and 12 to get 24.
\frac{24}{5}-2\left(\frac{1}{2}+\frac{10}{2}\right)
Convert 5 to fraction \frac{10}{2}.
\frac{24}{5}-2\times \frac{1+10}{2}
Since \frac{1}{2} and \frac{10}{2} have the same denominator, add them by adding their numerators.
\frac{24}{5}-2\times \frac{11}{2}
Add 1 and 10 to get 11.
\frac{24}{5}-11
Cancel out 2 and 2.
\frac{24}{5}-\frac{55}{5}
Convert 11 to fraction \frac{55}{5}.
\frac{24-55}{5}
Since \frac{24}{5} and \frac{55}{5} have the same denominator, subtract them by subtracting their numerators.
-\frac{31}{5}
Subtract 55 from 24 to get -31.
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}