Evaluate
7
Factor
7
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\frac{3+3+4+5+6+9+10+11+12+13+14+15}{15}
Add 1 and 2 to get 3.
\frac{6+4+5+6+9+10+11+12+13+14+15}{15}
Add 3 and 3 to get 6.
\frac{10+5+6+9+10+11+12+13+14+15}{15}
Add 6 and 4 to get 10.
\frac{15+6+9+10+11+12+13+14+15}{15}
Add 10 and 5 to get 15.
\frac{21+9+10+11+12+13+14+15}{15}
Add 15 and 6 to get 21.
\frac{30+10+11+12+13+14+15}{15}
Add 21 and 9 to get 30.
\frac{40+11+12+13+14+15}{15}
Add 30 and 10 to get 40.
\frac{51+12+13+14+15}{15}
Add 40 and 11 to get 51.
\frac{63+13+14+15}{15}
Add 51 and 12 to get 63.
\frac{76+14+15}{15}
Add 63 and 13 to get 76.
\frac{90+15}{15}
Add 76 and 14 to get 90.
\frac{105}{15}
Add 90 and 15 to get 105.
7
Divide 105 by 15 to get 7.
Examples
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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
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