$\int\tanh\left(7x\right)dx$
$\int\frac{6x}{x^{2}-5}dx$
$x\cdot lx$
$x^2+\frac{4}{3}-\frac{16}{36}$
$\int\:\left(x^3+x\right)\sqrt{x^4+2x^2}dx$
$a^2+3a+1a+3$
$4\left(2x+3\right)^2-12\left(2x+3\right)+5$
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