$345x+67x-98$

$\frac{5x+2}{x^3+1}$

$\frac{90}{3.14}$

$\frac{\cos\left(v\right)}{1+sin\left(v\right)}+\frac{1+sin\left(v\right)}{cos\left(v\right)}=2sec\left(v\right)$

$sen^2\left(x\right)-cos^2\left(x\right)=-0,5$

$\lim_{t\to0}\left(\frac{e^{4t}-1}{sin\left(t\right)}\right)$

$x ^ { 2 } - 17 x + 30$