$3-3\cos^2\left(x\right)=1+\sin^2\left(x\right)$

$\int_7^7\left(e^{x^2}\right)dx$

$\frac{d}{dx}\left(\frac{x\sqrt{x^2+7}}{\left(x+8\right)^{\frac{5}{3}}}\right)$

$\int\frac{sen\left(t\right)}{\sqrt{\left(cos\left(t\right)\right)^3}}dt$

$\int_0^2\left(\tan^5\left(x\right)\cdot\sec^2\left(x\right)\right)dx$

$a\left(1+a+a^2\right)-a$

$\sin\left(\pi-x\right)=\sin\left(x\right)$