$\ln\left(2x+7\cdot\log\left(x-9\right)=0\right)$
$\int_0^{\infty\:}b\left(w\right)sen\left(w\right)dw$
$0.05x\:+200\:=\:0.07x\:+\:175$
$x^2+y^2+z^2=z$
$\int\frac{10t^5}{\sqrt{t^2+2}}dx$
$f\left(x\right)=\sqrt[3]{\left(3x-2\right)^2}$
$20x^2-9x-20\ge0$
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