1. Resolver los siguientes polinomios aritméticos
a. 3(4+2x3)+2(10÷5+2)-4(5+4-3)
b. -50+{[(-10-3)(-4)+(-72)÷〖4]}〗^2
c. -[(-5)(-4)]^2+{(8x〖4)〗^2-(6+〖√25 )〗^2+[81÷(-9)]}
d. (-5)(-4)+{20-(4+〖√16 )〗^2+[(-3)^3÷(-9)]}