As character names:

U+2207 NABLA character (∇)

As raw characters:

∇

As a string of HTML entities:

∇

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 136, hex 0x88, octal \210, binary 10001000
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 135, hex 0x87, octal \207, binary 10000111
This is continuation byte 2, expecting 0 more.

U+2207	NABLA
	= backward difference
	= gradient, del
	* used for Laplacian operator (written with superscript 2)
	x (white down-pointing triangle - 25BD)