1. inequality sign：inequality 不等式;不等 | inequality sign 不等号 | infinite 无限;无穷
2. is not equal to：= is equal to 等號 | ≠ is not equal to 不等號 | ≡ is equivalent to 全等於號
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3. inequality signs：不等於is not equal to | 不等號inequality signs | 不等號sign of inequlity
1. 如果在区间上，，则用通俗明了的话说，就是定积分保持不等号。
In informal but descriptive language, we say that the definite integral preserves inequalities.
2. 本文利用矩阵论的方法讨论截断矩问题，无穷矩问题以及带不等号的矩问题。
The truncated moment, infinite moment and inequality moment problems are discussed by using the theory of matrices.
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3. 如果您正在保留这些字，请继续进行下去并且保留不等号（）和左右括号。
So long as you're reserving words, go ahead and reserve the not equal sign (), and, or, the left and right parentheses.