$$(4x+3)( { x }^{ 2 } -1)-( { 4 }^{ { x }^{ 3 } } -3x+1)$$
$-4^{x^{3}}+\left(4x+3\right)\left(x^{2}-1\right)+3x-1$
$-6\ln(2)x^{2}\times 4^{x^{3}}+12x^{2}+6x-1$
