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-6.85
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-6.85
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-\frac{8}{5}+\frac{2}{5}-\frac{5\times 5+2}{5}-0.25
Convert decimal number 0.4 to fraction \frac{4}{10}. Reduce the fraction \frac{4}{10} to lowest terms by extracting and canceling out 2.
\frac{-8+2}{5}-\frac{5\times 5+2}{5}-0.25
Since -\frac{8}{5} and \frac{2}{5} have the same denominator, add them by adding their numerators.
-\frac{6}{5}-\frac{5\times 5+2}{5}-0.25
Add -8 and 2 to get -6.
-\frac{6}{5}-\frac{25+2}{5}-0.25
Multiply 5 and 5 to get 25.
-\frac{6}{5}-\frac{27}{5}-0.25
Add 25 and 2 to get 27.
\frac{-6-27}{5}-0.25
Since -\frac{6}{5} and \frac{27}{5} have the same denominator, subtract them by subtracting their numerators.
-\frac{33}{5}-0.25
Subtract 27 from -6 to get -33.
-\frac{33}{5}-\frac{1}{4}
Convert decimal number 0.25 to fraction \frac{25}{100}. Reduce the fraction \frac{25}{100} to lowest terms by extracting and canceling out 25.
-\frac{132}{20}-\frac{5}{20}
Least common multiple of 5 and 4 is 20. Convert -\frac{33}{5} and \frac{1}{4} to fractions with denominator 20.
\frac{-132-5}{20}
Since -\frac{132}{20} and \frac{5}{20} have the same denominator, subtract them by subtracting their numerators.
-\frac{137}{20}
Subtract 5 from -132 to get -137.
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}