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)
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[tex]4.3+45\cdot2^2-53=4.3+45\cdot4-53=4.3+180-53=184.3-53=131.3[/tex]
