1, equation: x-y=3, x+y+z=7, y-2 = z.

Answer: x = 5, y = 2 and z = 0. Add it up to 520, which is super simple.

2. Equation: x2 (power of 2)-1834x+683280 = 0.

Answer: This formula has two solutions, which are 520 and 13 14.

3. Equation: r=a( 1-sinθ).

Answer: this is not a numerical answer, but a graphic answer, and the result is a heart.

4. Equation: [(n+52.8) × 5-3.9343] ÷ 0.5-10× n.n is an arbitrary number.

Answer: The final answer is 520 13 14.

5. Equation: trigonometric function, y= 1/x, x 2+y 2 = 9, y=|-2x|, x=-3|siny|.

Answer: The figure of the four formulas is love.