$15^3+36+54-b^3$

$\lim_{x\to0}\left(\frac{x^2\sin\left(2x\right)-4x^2sin\left(2x\right)}{16x^5-3x^3}\right)$

$\frac { 0 } { \frac { \pi } { 3 } }$

$\cos^2\left(x\right)dx=\tan^2\left(y\right)dy$

$\frac{4s-10}{\left(s-3\right)\left(s-2\right)\left(s-1\right)}$

$3b-2\left(2b+a\right)$

$\frac{4x^2}{t}-3tx-7$