Evaluate: \( 9 x-57 y-4 z-9 x+52 y+11 z+8 \) when \( x=7, y=4 \) and \( z=6 \) : \( \square \)

Substitute \( x=7,y=4,z=6 \) into the expression \( 9x-57y-4z-9x+52y+11z+8 \). Evaluate the expression by following steps: - step0: Evaluate: \(9x-57y-4z-9x+52y+11z+8\) - step1: Substitute: \(9\times 7-57\times 4-4\times 6-9\times 7+52\times 4+11\times 6+8\) - step2: Multiply the numbers: \(63-57\times 4-4\times 6-9\times 7+52\times 4+11\times 6+8\) - step3: Multiply the numbers: \(63-228-4\times 6-9\times 7+52\times 4+11\times 6+8\) - step4: Multiply the numbers: \(63-228-24-9\times 7+52\times 4+11\times 6+8\) - step5: Multiply the numbers: \(63-228-24-63+52\times 4+11\times 6+8\) - step6: Multiply the numbers: \(63-228-24-63+208+11\times 6+8\) - step7: Multiply the numbers: \(63-228-24-63+208+66+8\) - step8: Calculate: \(30\) The value of the expression \(9x-57y-4z-9x+52y+11z+8\) when \(x=7, y=4\) and \(z=6\) is 30.