$\left(-51\right)-\left(-88\right)$

$600.00-562.72$

$4\cdot x^2\cdot\frac{d^2y}{dx^2}+4\cdot x\cdot\frac{dy}{dx}+\left(2\cdot x^2-1\right)\cdot y=0$

$\left(-9\right)\cdot16+-15$

$\int\frac{5}{2}e^{\frac{5}{2}x}\cdot sin\left(x\right)dx$

$sin\left(a\right)=\frac{3}{4}$

$\left(\frac{4ay}{5y^4}\right)\cdot\frac{25y}{2a}$