$h+12=18$

$12r+5-3r-5$

$\arctan\left(\frac{-1+1}{-1-1}\right)+\arctan\left(\frac{-1-1}{2}\right)$

$\int\left(\frac{1}{2\sqrt{x}}+1\right)\ln\left(\sqrt{x}+x\right)dx$

$\int_2^2\frac{16}{x^4}dx$

$\frac{\cos\left(x\right)+\sin\left(x\right)}{1+\tan\left(x\right)}$

$\left(2y^3-7y^5\right)x\left(2y^3+7y^5\right)$