$3x^2+3x+2>0$
$15xy-10xy^2$
$\frac{x^4+16}{x+2}$
$\int\:\frac{1}{2}ln\left(5x\right)dx$
$2-44$
$-9\csc\left(x\right)-18=0$
$4n^2-4n+1$
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