$3.4t-24.18=7.6t+10.26$

$\lim_{x\to4}\left(\frac{\sqrt{x^2-7}}{x-1}\right)$

$\int\frac{e^x}{4-e^{2x}}dx$

$-101-80+44$

$\frac{dy}{dx}\left(x^2y^2=sqrt\left(x^2-y^2\right)\right)$

$\frac{1}{\sin^2\left(x\right)-\cos^2\left(x\right)}=3$