$-1^2-2$
$a\left(x\right)\:=\:\left(x+4\right)\left(x-2\right)$
$\frac{cos\:\left(2\:\theta\right)}{\left(cos^2\:\theta\right)\left(sec^2\:\theta\right)}$
$-36\cdot16$
$\left(6a+13^2\right)$
$\int\frac{5x^7+4x^2+x-1}{x+2}dx$
$\left(2-ab^2\right)\left(4-ab^2\right)$
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