$\int\frac{\left(tan^2\left(x\right)\right)}{\left(tan^2\left(x\right)+1\right)}dx$
$\frac{x^{m+2}}{x^{m-2}}$
$\int ln\left(7x-8\right)dx$
$12x^3-90^2-24x+12$
$\int\frac{1}{4+3x^2}dx$
$\int_{4-y}^{4-y^2}\left(-2x\right)dx$
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