$75\ge\frac{t}{5}+90$

$y''+25y=0$

$-3\left(3-6\right)$

$\left(8+\left(-4\right)\right)+2\left|5-3\left(5-3\right)+\left(-4\right)\right|-\left(4+\left(-2\right)\right)$

$y'+6y+\frac{9yt^2}{2}=1$

$\frac{\frac{\sin\left(x\right)}{\cos\left(x\right)}\cdot\left(1-2\sin\left(x\right)^2\right)}{2\sin\left(x\right)\cos\left(x\right)}$

$\int\sqrt{9-e^{2x}}e^{2x}dx$