Evaluate
78
Factor
2\times 3\times 13
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3-\left(-3\right)-4+5+6-7-\left(-8\times 9\right)
Add 1 and 2 to get 3.
3+3-4+5+6-7-\left(-8\times 9\right)
The opposite of -3 is 3.
6-4+5+6-7-\left(-8\times 9\right)
Add 3 and 3 to get 6.
2+5+6-7-\left(-8\times 9\right)
Subtract 4 from 6 to get 2.
7+6-7-\left(-8\times 9\right)
Add 2 and 5 to get 7.
13-7-\left(-8\times 9\right)
Add 7 and 6 to get 13.
6-\left(-8\times 9\right)
Subtract 7 from 13 to get 6.
6-\left(-72\right)
Multiply -8 and 9 to get -72.
6+72
The opposite of -72 is 72.
78
Add 6 and 72 to get 78.
Examples
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{ 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}