Use PEMDAS
P Parentheses first
E Exponents (ie Powers and Square Roots, etc.)
MD Multiplication and Division (left-to-right)
AS Addition and Subtraction (left-to-right)
[tex]6\cdot7-3^2\cdot9+4^3\\\\step\ 1:\\6\cdot7=42\\3^2=3\cdot3=9\\4^3=4\cdot4\cdot4=64\\\\=42-9\cdot9+64\\\\step\ 2:\\9\cdot9=81\\\\=42-81+64\\\\step\ 3:\\\text{use commutative property}\ a+b=b+a\\\\=42+64-81\\\\step\ 4:\\\text{make the sum and the difference}\\\\=106-81=25\\\\Answer:\ \boxed{25}[/tex]
