Largex Largery x turn this into a valid sentence by adding q

Large(x) ¬Larger(y, x) turn this into a valid sentence by adding quantifiers only

Solution

Large(x) means x is larger

then ~Larger(y, x) means y is larger while from first part we know that x is large

so we need to convert ~Larger(y, x) so that it gives x as larger again

to do that we can just put a negative before ~Larger(y, x) or remove negative from ~Larger(y, x)

both will represent same thing

Hence final answer is

Large(x) ¬(¬Larger(y, x))