$m+7=4,000$
$\int\left(\ln\left(x^2+13x+40\right)\right)dx$
$\:j+j+2kj+j+2k$
$3\:<8+x$
$\int\frac{1}{x\left(x^4+3\right)}dx$
$sin^2x=sinx$
$19\:.\:7\:-\left(-4\right)$
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