$1,21m^6b^4-1,44a^8x^2$
$m^4-2m^2+1$
$\tan x\left(\sin x+\cot x\csc x\right)$
$\int\:\frac{2x}{\left(x^2+3\right)^3}\:dx$
$cot\left(a\right)+sec\left(a\right)\cdot sin\left(a\right)=1$
$\int-\frac{3}{4+x^2}dx$
$h\left(x\right)=x^2+6x+9$
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