Step 1: Evaluate the multiplication and division from left to right. $1 * 2 = 2$ $2 / 45 = \frac{2}{45}$ $156 * 459 = 71604$ The expression becomes: $1 + \frac{2}{45} + 2 - 71604$ Step 2: Evaluate the addition and subtraction from left to right. $1 + \frac{2}{45} = \frac{45}{45} + \frac{2}{45} = \frac{47}{45}$ The expression becomes: $\frac{47}{45} + 2 - 71604$ $\frac{47}{45} + 2 = \frac{47}{45} + \frac{90}{45} = \frac{137}{45}$ The expression becomes: $\frac{137}{45} - 71604$ Step 3: Perform the final subtraction. $\frac{137}{45} - 71604 = \frac{137}{45} - \frac{71604 \times 45}{45}$ $71604 \times 45 = 3222180$ $\frac{137}{45} - \frac{3222180}{45} = \frac{137 - 3222180}{45} = \frac{-3222043}{45}$ $$ \boxed{-\frac{3222043}{45}} $$