Question 974953

{{{a =3}}} 
{{{b=-2}}} 
{{{c=5}}} 
{{{x = 4}}}
{{{ y = -3}}} 

{{{3ab - 2xy(5b - 2c + 4(x-2y))}}}

={{{3*3*(-2) - 2*4*(-3)(5*(-2) - 2*5 + 4(4-2*(-3)))}}}

={{{-18 + 24(5*(-2) - 2*5 + 4(4-2*(-3)))}}}

={{{-18 + 24(-10 - 10 + 4(4+6))}}}

={{{-18 + 24(-20 + 4(10))}}}

={{{-18 + 24(-20 + 40)}}}

={{{-18 + 24(20)}}}

={{{-18 + 480}}}

={{{462}}}