$\left(\frac{2+\sqrt{x}}{2}\right)^2-\left(1\right)^2$

$f\left(0.75\right)=\sqrt{x}\cdot e^{x-1}$

$6y^2-11y+4$

$\int_4^5\left(\frac{x}{\sqrt{4x^2-25}}\right)dx$

$\int\left(\frac{1}{2-3x^2}\right)dx$

$-\left(250-350\right)-\left(1500-750\right)-\left(-2800-1400\right)$

$\frac{5946.5}{194.39}$