Evaluate
-\frac{20}{3}\approx -6.666666667
Factor
-\frac{20}{3} = -6\frac{2}{3} = -6.666666666666667
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\frac{-2}{3}+1-7
Multiply -2 and \frac{1}{3} to get \frac{-2}{3}.
-\frac{2}{3}+1-7
Fraction \frac{-2}{3} can be rewritten as -\frac{2}{3} by extracting the negative sign.
-\frac{2}{3}+\frac{3}{3}-7
Convert 1 to fraction \frac{3}{3}.
\frac{-2+3}{3}-7
Since -\frac{2}{3} and \frac{3}{3} have the same denominator, add them by adding their numerators.
\frac{1}{3}-7
Add -2 and 3 to get 1.
\frac{1}{3}-\frac{21}{3}
Convert 7 to fraction \frac{21}{3}.
\frac{1-21}{3}
Since \frac{1}{3} and \frac{21}{3} have the same denominator, subtract them by subtracting their numerators.
-\frac{20}{3}
Subtract 21 from 1 to get -20.
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y = 3x + 4
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\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}