Multiply $56$ by $ \dfrac{g}{245} $ to get $ \dfrac{ 56g }{ 245 } $.

Step 1: Write $ 56 $ as a fraction by putting $ \color{red}{1} $ in the denominator.

Step 2: Multiply numerators and denominators.

Step 3: Simplify numerator and denominator.

$$ \begin{aligned} 56 \cdot \frac{g}{245} & \xlongequal{\text{Step 1}} \frac{56}{\color{red}{1}} \cdot \frac{g}{245} \xlongequal{\text{Step 2}} \frac{ 56 \cdot g }{ 1 \cdot 245 } = \\[1ex] & \xlongequal{\text{Step 3}} \frac{ 56g }{ 245 } \end{aligned} $$

Multiply $ \dfrac{56g}{245} $ by $ g $ to get $ \dfrac{ 56g^2 }{ 245 } $.

Step 1: Write $ g $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator.

Step 2: Multiply numerators and denominators.

Step 3: Simplify numerator and denominator.

$$ \begin{aligned} \frac{56g}{245} \cdot g & \xlongequal{\text{Step 1}} \frac{56g}{245} \cdot \frac{g}{\color{red}{1}} \xlongequal{\text{Step 2}} \frac{ 56g \cdot g }{ 245 \cdot 1 } = \\[1ex] & \xlongequal{\text{Step 3}} \frac{ 56g^2 }{ 245 } \end{aligned} $$

Add $ \dfrac{56g^2}{245} $ and $ 147 $ to get $ \dfrac{ \color{purple}{ 56g^2+36015 } }{ 245 }$.

Step 1: Write $ 147 $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator.

Step 2: To add raitonal expressions, both fractions must have the same denominator.
We can create a common denominator by multiplying the second fraction by $\color{blue}{245}$.

$$ \begin{aligned} \frac{56g^2}{245} +147 & \xlongequal{\text{Step 1}} \frac{56g^2}{245} + \frac{147}{\color{red}{1}} = \frac{ 56g^2 }{ 245 } + \frac{ 147 \cdot \color{blue}{ 245 }}{ 1 \cdot \color{blue}{ 245 }} = \\[1ex] & \xlongequal{\text{Step 2}} \frac{ \color{purple}{ 56g^2 } }{ 245 } + \frac{ \color{purple}{ 36015 } }{ 245 }=\frac{ \color{purple}{ 56g^2+36015 } }{ 245 } \end{aligned} $$