Evaluate
-\frac{20890}{3969}\approx -5.263290501
Factor
-\frac{20890}{3969} = -5\frac{1045}{3969} = -5.26329050138574
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\frac{28+5}{7}-\left(\frac{5}{7}+\frac{2\times 9+4}{9}\right)^{2}
Multiply 4 and 7 to get 28.
\frac{33}{7}-\left(\frac{5}{7}+\frac{2\times 9+4}{9}\right)^{2}
Add 28 and 5 to get 33.
\frac{33}{7}-\left(\frac{5}{7}+\frac{18+4}{9}\right)^{2}
Multiply 2 and 9 to get 18.
\frac{33}{7}-\left(\frac{5}{7}+\frac{22}{9}\right)^{2}
Add 18 and 4 to get 22.
\frac{33}{7}-\left(\frac{199}{63}\right)^{2}
Add \frac{5}{7} and \frac{22}{9} to get \frac{199}{63}.
\frac{33}{7}-\frac{39601}{3969}
Calculate \frac{199}{63} to the power of 2 and get \frac{39601}{3969}.
-\frac{20890}{3969}
Subtract \frac{39601}{3969} from \frac{33}{7} to get -\frac{20890}{3969}.
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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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}