$6\cdot2-3$
$2^2+5\:+-1\:+2-\:1^2$
$\int\:\frac{cos\left(\sqrt{t}\right)}{\sqrt{t}}dt$
$sin^2\left(x\right)-2\:cos^2\left(x\right)=1$
$-178+870$
$\frac{d}{dx}\sqrt{3x+7}=9+x^2y^2$
$\left(x^{n+1}+3x^{n-2}\right)^2$
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