$\frac{h}{2}+20\le-18$
$x2+6x+5+x+1$
$4y^2-16y+16$
$\frac{10-5sec^2x}{sec^2x}$
$\int ln\left(2x+3\right)dx$
$csc^2x+cot^2x-1$
$5-0-\left(-6\right)$
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