$3-x^2+2abx^2-bab$
$\int\sin^5\left(4x\right)\csc^3\left(4x\right)dx$
$\frac{1-sen^2x}{sec^2x}\:$
$\int e^{-2x}.sin\left(e^{-x}\right)dx$
$\frac{3x^3-2x^2-7x-2}{x+2}$
$\int x\left(7+x^5\right)dx$
$f\:\left(t\right)=x^2e^2^x$
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