$\int\left(\frac{x}{\sqrt{\left(4x+1\right)}}\right)dx$
$\int20x\:e^{0.01x}dx$
$x^2-4x+-4$
$9m^2+18m+9$
$-2x-5>0$
$cos=0.45$
$\left(x+3\right)^2-\left(x+2y\right)^2$
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