$\int\frac{x+4}{\left(x^2+1\right)}dx$

$\sec^22x-1=\tan^22x$

$-2^2\cdot3-2\cdot3^2+-2\cdot3+3$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{4x^2-\pi^2}{\cos\left(x\right)}\right)$

$t+25=26$

$\left(1.03\right)^{10}$

$\int\left(\left(x^2+x\right)^{12}\left(2x+1\right)\right)dx$