use order of operations or PEMDAS
this is order of simplification
work from left to right
Parentahsees (grouping symbols)
Exponents
multiplication or division
addition or subtraction
so
replace a with 1, b=2 and c with -8
[tex]-2(3(1)-6)^2+5(-8) / 4*(-3)-(-2(2))^3[/tex]
[tex]-2(3-6)^2+5(-8) / 4*(-3))-(-2(2))^3[/tex]
[tex]-2(-3)^2+5(-8) / 4*(-3)-(-2(2))^3[/tex]
[tex]-2(-3)^2+5(-8) / 4*(-3)-(-4)^3[/tex]
now exponents
[tex]-2(9)+5(-8) / 4*-3)-(-4)^3[/tex]
[tex]-2(9)+5(-8) / 4*(-3)-(-64)[/tex]
multiply and divide, working from left to right (remember, division is multiplication by a fraction)
[tex]-18+5(-8) / 4*(-3)-(-64)[/tex]
[tex]-18-40 / 4*(-3)-(-64)[/tex]
[tex]-18-10*(-3)-(-64)[/tex]
[tex]-18+30-(-64)[/tex]
[tex]-18+30-1(-64)[/tex]
[tex]-18+30+64[/tex]
addition and subtraction
[tex]12+64[/tex]
[tex]76[/tex]
