$2n+3=55$

$\int\frac{1}{x^2+2x-12}dx$

$\left(1-3x\right)\left(2-3xb\right)$

$+5+6+9-5-4-3+8+6+5-2-1+7$

$\int x\cdot\sin\left(\frac{1}{4}\left(x\right)\right)dx$

$( 2 a ^ { 3 } b ^ { 3 } ) ^ { - 4 } ( b ^ { - 1 } a ^ { 8 } ) ^ { 4 }$

$\sqrt{1+2\sin\left(x\right)\cdot\cos\left(x\right)}$