Evaluate
\frac{71}{21}\approx 3.380952381
Factor
\frac{71}{3 \cdot 7} = 3\frac{8}{21} = 3.380952380952381
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\frac{4+4+15+12+30+6}{21}
Multiply 3 and 5 to get 15. Multiply 3 and 4 to get 12. Multiply 6 and 5 to get 30. Multiply 1 and 6 to get 6.
\frac{8+15+12+30+6}{21}
Add 4 and 4 to get 8.
\frac{23+12+30+6}{21}
Add 8 and 15 to get 23.
\frac{35+30+6}{21}
Add 23 and 12 to get 35.
\frac{65+6}{21}
Add 35 and 30 to get 65.
\frac{71}{21}
Add 65 and 6 to get 71.
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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}