$\left(-8\right)-\left(-9\right)+5$

$\int_0^{90}\left(\sin\left(x\right)^2\right)dx$

$\frac{dy}{dx}=\sin x\cos^2x$

$\lim_{x\to0}\left(\frac{3}{x^2}-\frac{5}{x}\right)$

$4\left(\frac{3}{2}\right)^5-4\left(\frac{3}{2}\right)^4+10\left(\frac{3}{2}\right)^2-\left(\frac{3}{2}\right)-6$

$\frac{90a^6b^4}{-9\:a^4b^3}\:\:$

$t\frac{dy}{dt}=\left(2-t\right)y+t^3e^t$