$\log x+\log6=\log30-\log5$
$4\left(11+7\right)-9\cdot8$
$\frac{dy}{dx}=\frac{2x-9}{y}$
$\left(m+n-1\right)\left(m^2\:+\:1\right)-m^2\:-1\:$
$\lim_{x\to-1}\frac{2x^2+5x+3}{x+1}$
$\int\left(x^7\sqrt{lnx}\right)dx$
$\left(d^2g^5u^3+g^4\right)^2$
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