$$7 \cdot \frac { y ^ { 2 } + 5 x + 4 } { y ^ { 2 } + 3 x - 4 }$$
$\frac{7\left(5x+y^{2}+4\right)}{3x+y^{2}-4}$
$$\frac{7\left(y^{2}+5x+4\right)}{y^{2}+3x-4}$$
$$\frac{7y^{2}+35x+28}{y^{2}+3x-4}$$
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