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\displaystye \\I_{6}=\frac{8}{15}I_{2}+\frac{4}{15}tanh(x)sech^{2}(x)+\frac{1}{5}tanh(x)sech^{4}(x)\\ I_{6}=\frac{8}{15}\tanh x+\frac{4}{15}tanh(x)sech^{2}(x)+\frac{1}{5}tanh(x)sech^{4}(x)
\mathbb{P}(1-k-x \le y \le k) = \int_{1-2k}^k (2k-1)+x dx = [ (2k-1)x + x^2/2]_{1-2k}^k \\[br]= (3k-1)(2k-1)+\frac{k^2-(1-2k)^2}{2}
\ y = a^x}
y = x^x^x
lny = ln(x^x^x)
y = x^x^2
lny = ln(x^x^2)
\frac{dy}{dx} = x^x^2(2xlnx + x)
\left[ \begin {array}{c} x\\\noalign{\medskip}y\\\noalign{\medskip}z\end {array} \right] =\left[ \begin {array}{c} 1\\\noalign{\medskip}2\\\noalign{\medskip}t\end {array} \right]