Writing integral with bounds `int_2^5`

For integral just use int.

Example: `int2xdx`

Syntax: \`intdxdx\`

Fro integral with bounds for lower bound use _2 and upper bound 5 use int_2^5

Example `int_2^5sinxdx`

Syntax: \`int_2^5sinxdx\`

If the bound has letter and or function, use parenthesis

Example `int_(pi/3)^(pi/4)sinxdx`

Syntax: \`int_(pi/3)^(pi/4)sinxdx\`