1 over 3 should be the answer I think
Make all fractions with a 48 denominator:
21/48 + 28/48 + 42/48 + 88/48
=179/48 = 3 (35/48)
1 Cancel <span>33</span>
<span>x+\frac{6}{x}+4+x-1<span>x+<span><span>x</span><span>6</span><span></span></span>+4+x−1</span></span>
2 Collect like terms
<span>(x+x)+\frac{6}{x}+(4-1)<span>(x+x)+<span><span>x</span><span>6</span><span></span></span>+(4−1)</span></span>
3 Simplify
<span><span>2x+\frac{6}{x}+3<span>2x+<span><span>x</span><span>6</span><span></span></span>+3</span></span><span>
</span></span>
Is is it a function Bcoz 4 and 0 has only one out. When you have one in and two out that's means is not a function.