\((1)\)如果\(+15\)表示高出标准水位\(15\)米,那么\(-4\)表示______.
\((2)\)比\(-8\)小\(5\)的数是______.
\((3) \dfrac{1}{3} \)的倒数是______;\(- \dfrac{1}{2} \)的相反数是______.
\((4)\)化简:\(a-(a-3b)=\)______.
\((5)\)多项式\(x^{3}y^{2}+4x^{2}y-5x-1\)的次数是______,项数是______,常数项是______.
\((6)\)对有理数\(a\),\(b\),规定一种新运算\(※\),意义是\(a※b=ab+a+b\),则方程\(x※3=4\)的解是\(x=\)______.