Evaluate
-\frac{E}{G}+7
Differentiate w.r.t. G
\frac{E}{G^{2}}
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\frac{7G}{G}-\frac{E}{G}
To add or subtract expressions, expand them to make their denominators the same. Multiply 7 times \frac{G}{G}.
\frac{7G-E}{G}
Since \frac{7G}{G} and \frac{E}{G} have the same denominator, subtract them by subtracting their numerators.
Examples
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y = 3x + 4
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Matrix
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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
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Limits
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