4(a−b)+6b (−3)∙(2a+b)−4(b−a) (−2)∙(2a−b)+3(a+b) (−5)∙(3b−2a)−6(a+2b) can u simplify these each line is a new problem

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4