$\int45e^{2x+3}dx$

$\int\sqrt{5x+f}dx$

$\frac{1}{\sin\left(u\right)\sec\left(u\right)}=\cot\left(u\right)$

$-15+7+6-4+12+8+3-2-1+9$

$\frac{x^3+4x^2-x-4}{x+4}$

$\frac{\left(3x^2y^3\right)}{\left(3x^{-4}\right)^{\frac{1}{4}}}.\frac{\left(3^{\frac{1}{2}}x^4y^{\frac{1}{2}}\right)^{\frac{1}{2}}}{\left(2x^{\frac{1}{2}}y^{\frac{3}{4}}\right)^{-2}}$

$t^2+45t-144$