$f^2-4f+4$
$sin^2\left(3t\right)$
$\int\csc^2\left(2t\right)dt$
$tan\:cot\:=1$
$-36\cdot5$
$\int\frac{5}{4}x^4dx$
$\left(2x^2y+4m^3\right)$
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