Evaluate
-\frac{7}{30}\approx -0.233333333
Factor
-\frac{7}{30} = -0.23333333333333334
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-\frac{8}{15}+\frac{3}{10}
The opposite of -\frac{3}{10} is \frac{3}{10}.
-\frac{16}{30}+\frac{9}{30}
Least common multiple of 15 and 10 is 30. Convert -\frac{8}{15} and \frac{3}{10} to fractions with denominator 30.
\frac{-16+9}{30}
Since -\frac{16}{30} and \frac{9}{30} have the same denominator, add them by adding their numerators.
-\frac{7}{30}
Add -16 and 9 to get -7.
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}