A. \frac{4}{x+3} - \frac{5}{x-1} b. \frac{3}{2x+5} + \frac{2}{6x²+7x-20} c. \frac{2a}{3x} × \frac{2x-6xy}{12a} d. \frac{x²+4x-12}{2x²+9x-18} e. \frac{-3x²+18x+21}{x²-8x+21} f. \frac{-6x²+22x-20}{9x²-25} g. \frac{12}{x-9} ÷ \frac{3}{x+3} saya mohon dibantu yaa binggung banget :(