$2x^2\left(-x-1\right)\left(x-3\right)$

$29x+40\left(x-3\right)+14.5\left(x-3\right)\left(x-5\right)-2.3\left(x-3\right)\left(x-5\right)\left(x-7\right)$

$36x^2-c^4$

$\left(2m^2-1\right)^2$

$7+\int_1^{e^{6x}}\left(t\right)dt$

$\tan^2\left(x\right)\cdot\left(1-\sin^2\left(x\right)\right)$

$\int\left(\tan^3\frac{x}{2}\right)dx$