ଯଦି \(\rm \left(\frac{5}{3}\right)^{-5}\times \rm \left(\frac{5}{3}\right)^{-11}=\rm \left(\frac{25}{9}\right)^{4x} \) ହୁଏ, ତେବେ (5x³ + 3) ର ମୂଲ୍ୟ ହେଉଛି: