exam Maths Puzzle Numerical Ability

Evaluate each function and simplify where possible
a)
g(-1) if g(x)= -x^2-x

b)
g(x) +3 if g(x)=x^2+x

c)
h(x-1) if h(x)=3x-2

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exam Other Question

3x-y<(less than/or equal to)6
x>(greater than or equal to)1
y(less than or equal to)3

changing the signs to equal signs I get
3x-y=6
y=6+3x
the two other equations confuse me as to where I go now how many different six-digit numbers can be formed from the digits 1,2,3,4,5, and 6 if each digit is only used once?