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8a+7
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8a+7
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7a-16-\left(-a\right)-\left(-23\right)
To find the opposite of -a-23, find the opposite of each term.
7a-16-\left(-a\right)+23
The opposite of -23 is 23.
7a+7-\left(-a\right)
Add -16 and 23 to get 7.
7a+7+a
Multiply -1 and -1 to get 1.
8a+7
Combine 7a and a to get 8a.
7a-16-\left(-a\right)-\left(-23\right)
To find the opposite of -a-23, find the opposite of each term.
7a-16-\left(-a\right)+23
The opposite of -23 is 23.
7a+7-\left(-a\right)
Add -16 and 23 to get 7.
7a+7+a
Multiply -1 and -1 to get 1.
8a+7
Combine 7a and a to get 8a.
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{ x } ^ { 2 } - 4 x - 5 = 0
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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}