$4a^2+6ab+6ab+9b^2$
$0.1-3\left(0.4n-0.3\right)$
$\int^5e^3dx$
$12x^2y-8xy^2$
$-12x^2+3x+1<0$
$\int_0^{\frac{\pi}{2}}2\sin\left(t\right)dt$
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