$\int\left(sin^5x+2sin^2x+sinx\right)cosdx$

$\int\left(x\cdot3^{-x^2}\right)dx$

$\int\:\frac{\left(\sqrt{x}-1\right)^2}{x^2}dx$

$-21.8-\left(-18.3\right)$

$-6-7f-4f-2-3f+8-2f$

$\int\left(\frac{x-x^2}{x^3+x^2+x+1}\right)dx$

$\left(\sqrt{a}2\sqrt{3b}\right)\left(\sqrt{c}3\sqrt{3b}\right)$