$\int\frac{1}{\left(\sqrt{x^2+2x+26}\right)}dx$
$( 6 x y ) ( b c ) ( b x )$
$343+a^3$
$9m^2n+15mn+25n^2$
$-4x-\left(-7-5x\right)$
$\tan\left(a\right)^4+\tan\left(a\right)^2=\sec\left(a\right)^4-\sec\left(a\right)^2$
$x^2y^2-100$
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