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\( a^{b}\)

\( a_{b}^{c}\)

\({a_{b}}^{c}\)

\(a_{b}\)

\(\sqrt{a}\)

\(\sqrt[b]{a}\)

\(\frac{a}{b}\)

\(\cfrac{a}{b}\)

\(+\)

\(-\)

\(\times\)

\(\div\)

\(\pm\)

\(\cdot\)

\(\amalg\)

\(\ast\)

\(\barwedge\)

\(\bigcirc\)

\(\bigodot\)

\(\bigoplus\)

\(\bigotimes\)

\(\bigsqcup\)

\(\bigstar\)

\(\bigtriangledown\)

\(\bigtriangleup\)

\(\blacklozenge\)

\(\blacksquare\)

\(\blacktriangle\)

\(\blacktriangledown\)

\(\bullet\)

\(\cap\)

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\(\circ\)

\(\circledcirc\)

\(\dagger\)

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\(\diamond\)

\(\dotplus\)

\(\lozenge\)

\(\mp\)

\(\ominus\)

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\(\oslash\)

\(\otimes\)

\(\setminus\)

\(\sqcap\)

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\(\left ( a \right )\)

\(\vert a \vert\)

\(\leftarrow\)

\(\leftharpoondown\)

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\(\rightharpoondown\)

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\(\approx \)

\(\asymp \)

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\(\dashv \)

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\(= \)

\(\equiv \)

\(\frown \)

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\(\gg \)

\(\gt \)

\(| \)

\(\leq \)

\(\leqslant \)

\(\ll \)

\(\lt \)

\(\models \)

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\(\parallel \)

\(\perp \)

\(\prec \)

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\(\vdash\)

\(\in \)

\(\ni \)

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\(\nsubseteq \)

\(\nsupseteq \)

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\(\sqsubseteq \)

\(\sqsupset \)

\(\sqsupseteq \)

\(\subset \)

\(\subseteq \)

\(\subseteqq \)

\(\supset \)

\(\supseteq \)

\(\supseteqq \)

\(\emptyset\)

\(\mathbb{N}\)

\(\mathbb{Z}\)

\(\mathbb{Q}\)

\(\mathbb{R}\)

\(\mathbb{C}\)

\(\alpha\)

\(\beta\)

\(\gamma\)

\(\delta\)

\(\epsilon\)

\(\zeta\)

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\(\Pi\)

\(\Sigma\)

\(\Upsilon\)

\(\Phi\)

\(\Psi\)

\(\Omega\)

\((a)\)

\([a]\)

\(\lbrace{a}\rbrace\)

\(\frac{a+b}{c+d}\)

\(\vec{a}\)

\(\binom {a} {b}\)

\({a \brack b}\)

\({a \brace b}\)

\(\sin\)

\(\cos\)

\(\tan\)

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\(\sec\)

\(\csc\)

\(\sinh\)

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\(\coth\)

\(\bigcap {a}\)

\(\bigcap_{b}^{} a\)

\(\bigcup {a}\)

\(\bigcup_{b}^{} a\)

\(\coprod {a}\)

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\(\prod {a}\)

\(\prod_{b}^{} a\)

\(\sum_{a=1}^b\)

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\(\sum {a}\)

\(\underset{a \to b}\lim\)

\(\int {a}\)

\(\int_{b}^{} a\)

\(\iint {a}\)

\(\iint_{b}^{} a\)

\(\int_{a}^{b}{c}\)

\(\iint_{a}^{b}{c}\)

\(\iiint_{a}^{b}{c}\)

\(\oint{a}\)

\(\oint_{b}^{} a\)

Only an acid can turn blue litmus paper red

and NH4Cl which is option b is an acid salt formed as a result of a strong acid and weak base

NH4 + Cl = NH4Cl

option a is a basic salt formed as a result of a weak acid and strong base it can't turn blue litmus paper red

Option c is neutral formed a result of a strong acid and a strong base it will not react same as option d