$sin^2\left(x\right)=-4-5\:sin\left(x\right)$
$\int\left(\frac{e^{9x}}{e^{9x}+2}\right)dx$
$9ax+81b$
$3c+2=3c+2$
$2 ( x ^ { 5 } - x ^ { 6 } )$
$27\:\left(+3\right)$
$\left(2d-1\right)\left(2d+1\right)$
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