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\[ \int k \, \textrm{d}x =\]
\[ \int \, \textrm{d}x =\]
\[ \int 0 \, \textrm{d}x =\]
\[ \int k \, f(x) \, \textrm{d} x =\]
\[ \int \big ( f(x) \pm g(x) \big ) \, \textrm{d} x =\]
\[ \int x^n \, \textrm{d} x = \]
\[ \int \sin(x) \, \textrm{d}x =\]
\[ \int \cos(x) \, \textrm{d}x =\]
\[ \int \sec^2(x) \, \textrm{d}x =\]
\[ \int \csc^2(x) \, \textrm{d}x =\]
\[ \int \sec(x)\tan(x) \, \textrm{d}x =\]
\[ \int \csc(x)\cot(x) \, \textrm{d}x =\]
\[ \sum_{i=1}^n c = \]
\[ \sum_{i=1}^n i = \]
\[ \sum_{i=1}^n i^2 = \]
\[\int \frac{1}{1+x^2}\,dx=\tan^{-1}x+C\]
