book Maths Puzzle Numerical Ability

**simplify**
3m-2(-5m-8)

(8d^2+6d+4)/2

(3/4)(12g+48

2(a+b)-3(-2a-b^2)

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book Other Question

hi can you please help me with this question...it says:
substitute a=-12 and b=-2 to find the value of this expression
2(a-5b)

thank you
8x^5-12x^4+38x^3-49x^2+24x-4
List Zero Combinations (Real and Imaginary)
Extreme Right and Left Behavior
Lower Bound (Greatest Negative Interger)
Consecutive Interger Intervals