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2\times 15.21-9\times 3.9+4>0
Calculate 3.9 to the power of 2 and get 15.21.
30.42-9\times 3.9+4>0
Multiply 2 and 15.21 to get 30.42.
30.42-35.1+4>0
Multiply 9 and 3.9 to get 35.1.
-4.68+4>0
Subtract 35.1 from 30.42 to get -4.68.
-0.68>0
Add -4.68 and 4 to get -0.68.
\text{false}
Compare -0.68 and 0.
Examples
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{ 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}