Bardzo prosze o pomoc [(3-pierwiastek5)^1/2+(3+pierwiastek5)^1/2]^-2*[(27/8)^1/3-28^0]

jeżeli ^ oznacza *, to: [latex] frac{1}{2} (3- sqrt{5} ) + frac{1}{2} (3+ sqrt{5} )*-2( frac{27}{8}* frac{1}{3}) [/latex] = [latex] frac{1}{2} (9-5)^{2} * -2* frac{9}{8} [/latex] = [latex] frac{1}{2} *4*4*- frac{9}{4} [/latex] = -18