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-1
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-1
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15-2\left(7+6-5-2\right)-\left(7-5+2\right)
Subtract 3 from 18 to get 15.
15-2\left(13-5-2\right)-\left(7-5+2\right)
Add 7 and 6 to get 13.
15-2\left(8-2\right)-\left(7-5+2\right)
Subtract 5 from 13 to get 8.
15-2\times 6-\left(7-5+2\right)
Subtract 2 from 8 to get 6.
15-12-\left(7-5+2\right)
Multiply 2 and 6 to get 12.
3-\left(7-5+2\right)
Subtract 12 from 15 to get 3.
3-\left(2+2\right)
Subtract 5 from 7 to get 2.
3-4
Add 2 and 2 to get 4.
-1
Subtract 4 from 3 to get -1.
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}