Evaluate
67
Factor
67
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5+3+4+3+4+3+3+3+4+4+4+6+4+4+3+6+4
Add 4 and 1 to get 5.
8+4+3+4+3+3+3+4+4+4+6+4+4+3+6+4
Add 5 and 3 to get 8.
12+3+4+3+3+3+4+4+4+6+4+4+3+6+4
Add 8 and 4 to get 12.
15+4+3+3+3+4+4+4+6+4+4+3+6+4
Add 12 and 3 to get 15.
19+3+3+3+4+4+4+6+4+4+3+6+4
Add 15 and 4 to get 19.
22+3+3+4+4+4+6+4+4+3+6+4
Add 19 and 3 to get 22.
25+3+4+4+4+6+4+4+3+6+4
Add 22 and 3 to get 25.
28+4+4+4+6+4+4+3+6+4
Add 25 and 3 to get 28.
32+4+4+6+4+4+3+6+4
Add 28 and 4 to get 32.
36+4+6+4+4+3+6+4
Add 32 and 4 to get 36.
40+6+4+4+3+6+4
Add 36 and 4 to get 40.
46+4+4+3+6+4
Add 40 and 6 to get 46.
50+4+3+6+4
Add 46 and 4 to get 50.
54+3+6+4
Add 50 and 4 to get 54.
57+6+4
Add 54 and 3 to get 57.
63+4
Add 57 and 6 to get 63.
67
Add 63 and 4 to get 67.
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}