Evaluate
806
Factor
2\times 13\times 31
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3+3+4+6+9+12+13+18+26+36+39+52+78+117+156+234
Add 1 and 2 to get 3.
6+4+6+9+12+13+18+26+36+39+52+78+117+156+234
Add 3 and 3 to get 6.
10+6+9+12+13+18+26+36+39+52+78+117+156+234
Add 6 and 4 to get 10.
16+9+12+13+18+26+36+39+52+78+117+156+234
Add 10 and 6 to get 16.
25+12+13+18+26+36+39+52+78+117+156+234
Add 16 and 9 to get 25.
37+13+18+26+36+39+52+78+117+156+234
Add 25 and 12 to get 37.
50+18+26+36+39+52+78+117+156+234
Add 37 and 13 to get 50.
68+26+36+39+52+78+117+156+234
Add 50 and 18 to get 68.
94+36+39+52+78+117+156+234
Add 68 and 26 to get 94.
130+39+52+78+117+156+234
Add 94 and 36 to get 130.
169+52+78+117+156+234
Add 130 and 39 to get 169.
221+78+117+156+234
Add 169 and 52 to get 221.
299+117+156+234
Add 221 and 78 to get 299.
416+156+234
Add 299 and 117 to get 416.
572+234
Add 416 and 156 to get 572.
806
Add 572 and 234 to get 806.
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Linear equation
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}