$\int_0^{\pi}\left(6x\sin\left(x\right)\right)dx$

$-6^2$

$\lim_{x\to1}\left(\frac{\sin\left(\pi x^2\right)}{x-1}\right)$

$\left(u^4x\:u^{-2}\right)^{\frac{5}{2}}$

$\left(2x^5\right)^4$

$\left(5x-2\right)^2=10$

$\frac{1+sin\left(x\right)}{\cos^3\left(x\right)}-\frac{sin\left(x\right)}{cos\left(x\right)\left(1-sin\left(x\right)\right)}=sec\left(x\right)$