Evaluate
84
Factor
2^{2}\times 3\times 7
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23+32+30-20-17-24+4\times 15
Subtract 62 from 85 to get 23.
55+30-20-17-24+4\times 15
Add 23 and 32 to get 55.
85-20-17-24+4\times 15
Add 55 and 30 to get 85.
65-17-24+4\times 15
Subtract 20 from 85 to get 65.
48-24+4\times 15
Subtract 17 from 65 to get 48.
24+4\times 15
Subtract 24 from 48 to get 24.
24+60
Multiply 4 and 15 to get 60.
84
Add 24 and 60 to get 84.
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}