$10x^2-20am$
$9y^4+30y^2+25$
$\int\frac{1}{x\sqrt[2]{9+4x^2}}dx$
$\sqrt{4}+3>4+\sqrt{3}$
$\int\frac{x+1}{x^4-3x^3+2x^2}dx$
$\frac{21^x}{3^x}$
$3\:\cdot\:\:sin\:x^2\:-2\:\cdot\:\sqrt{2}\cdot\:\:sin\:x\:-\:cos\:x^2\:+1\:=0$
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