$f\left(x\right)=\frac{\left(x+1\right)\left(4x+1\right)\left(7x+1\right)}{\sqrt{8x+1}}$
$\left(5x+3\right).\left(3x+2\right)$
$3\left(3x+5\right)\:-4x+5=-15$
$\frac{dy}{dx}+\frac{1}{x}y=\frac{2}{3}x^2y^2$
$z^2+22z+121$
$\left(-5+6-3+6\right)+3-\left(+5-2+1\right)$
$900.45+100.89$
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